Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d8e951054a1b80…

MALICIOUS

PDF

78.6 KB Created: 2021-06-28 02:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7c19e75d3f7d0eb3e7495192e45b03f1 SHA-1: 4f80d71f8b1ee0ab3b3ec620e82b20202d4cefbe SHA-256: 26d8e951054a1b805efcfa7e37344d8d9c4a5ae69b9ef7eb9bdf6607992c0257
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous external URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of 'utm_term=incoming+facetime+call' in one URL indicates a potential lure for social engineering. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://irlanc.ru/uplcv?utm_term=incoming+facetime+call PDF link annotation
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076d7d29b76d---22384536714.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/66097385335.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/37sk9o17s95luda08igdfov9bt/rojafimumif.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/82753627820.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/janotagugapufofuvovo.pdfIn PDF document text
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/noxarir.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/fipagemesubew.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/93f3dbd6f93ae119d2fbba57ac1fd002/513017913.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/s8j3uu0p9prq6bb930vsqv0ns5/46807446083.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/aacfaaba69ccd926eb9cae39aa5cd2d2/wolovolatelatidomet.pdfIn PDF document text
    • http://fxmeat.com/upload/file/1cb5f9cf2097de81c59d0f75c815a2f3.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/25145275514.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/268e702a26ccda514c1e80b1dc5eddb6/77684965528.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/56811353741.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/715549838ac8c6e292cd0a6f09de9976/81697189338.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/71887e9e1c7b08eb1791a0df963ce045/tidulajuwut.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/h3808m362j30i79e9jbuqo6kor/5392212215.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/1dc475cb1288147fce61ab5b6e740ce2/80619355736.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb3768c548---68409364350.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/8abf6ab5bf1b389eee87747efa7af4b3/tubewekejaxepiwi.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/megifezol.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cabb615734---8585467973.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/tutiwevegajusovipugozisi.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11D 10364 bytes
SHA-256: 8355dd38038740f96592aaef7d105c00ed9338d0c2b9c3326bd9708480442864
font_01_sfnt_off0000e880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE880 17184 bytes
SHA-256: 4e279f4042ae3a7e696a9396f55d5ac1626c23c4adf08f7407dc0328e27f4e92
font_02_sfnt_off00011552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11552 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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