Malicious PDF — malware analysis report

Static analysis result for SHA-256 979d870031ed005c…

MALICIOUS

PDF

156.2 KB Created: 2021-06-26 04:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e22c16c895ad1ffe0c20e68def926b30 SHA-1: 963578434b6962e254594af54e63ec96d6eecd02 SHA-256: 979d870031ed005c311e3e1b47c2a4bf6e0569b8b333599a0cda63a29a38ea1c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity, likely aiming to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9246

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/b3a5392bce30a6ecc2140fa492ab3e90/ladisaduk.pdf In PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc0f2d5e6b---sewogodiwedupoxivonixikus.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/50eo9fesp27gc2ijsgpdv0lrsh/33806934320.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/migotilokeruruwabewupa.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dc2a03e95---855405032.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/gobizut.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607794ae52826---sisubixe.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/wijevunela.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/efeb2504b61e6c83ee2855e1211542c1/29593281858.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/e5002e40c2e4304584b9fd9c04a2a0c3/xifuwe.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/02e7b13c7dc26c9ea08468a13c3d5de0/najivukafibodas.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/53856874123.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/kuduxexalo.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf806e8c795---50644680039.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/62ab8f83875e351845281f686b3da7e2/22567856914.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608508d90d5f8---rezazuwo.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b28e0f071e---68214342130.pdfIn PDF document text
    • http://emeat.ru/var/files/69827493651.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083db801fc57---zumavasabimotekixudid.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/7botc14aivbeh7e16bnf01libs/59770318532.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083221499e0e---56752693942.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f25f1afa55---5637501713.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/4c1f7d03a7e9dcc166f8b4800d5d3920/mawoxesivadudenowogiduvi.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/rilovumizomazoj.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/5817395573.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b2b8cdf87---kuzesedovudazarifetafozeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=kanye+west+my+beautiful+dark+twisted+fantasy+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F0CC 11040 bytes
SHA-256: 021fbb3640630bbdd3104a2bb4daa8666a2f1701a892a4f151357520636f86dc
font_01_sfnt_off00020a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00022299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22299 18328 bytes
SHA-256: 2c7d2748327d435fc3cd5635d82e3b0e87ffc521b63a1dfb5bc90d35dde96d54
font_03_sfnt_off00025277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25277 3952 bytes
SHA-256: b22fa4f1d67afedff223e1629c843df41dd76296f6e10fdc4fe9e49921a54e07

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