Malicious PDF — malware analysis report

Static analysis result for SHA-256 44edac87e3b4bea3…

MALICIOUS

PDF

178.9 KB Created: 2021-07-30 23:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: fbd5c62fd5b6ca93110676c96033c8a4 SHA-1: 3035697f337ec3913fb7b4c95946d23e14cbbfa7 SHA-256: 44edac87e3b4bea3fce3d9b1097f34dd0ea4db1d9896980528334aab14a6d0f6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous external links, many pointing to compromised CMS uploads or disposable hosting, further suggests a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9870

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/42870a4343e5272a236ab09e3ddd4a0a/30674064956.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090812cd8c44---pubafakefi.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210601142140652452ji8k3t.pdfIn PDF document text
    • http://hydrem.ru/images/file/werakedexima.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f519e4b298---67328812366.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/vofomude.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/45413578928.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/82099023158.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/31195438642.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/8a43f5e1006c1342acca7c25b8798b5f/pojezosixapaw.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/rokawezimujinat.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/qvh78hrahuq0gsqhpj6rbl2dl0/9929935196.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/89667239615.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608efc1a57777---53545280383.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/5ngr69hu52jum4uliqbccc0j6t/nugajojutotikamonuwuluxir.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/movinolekezozatinukapubos.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d379b7cc98---kepalo.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160d65de87d927---nejojelosoboxamodedi.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kikiji.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b30a3a966df---dagojinonukuma.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/26061754877.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d81aef194ab---95798962790.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/009889bea89c118276599d9f2c775083/95476395904.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/9096131851.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=what+is+the+main+idea+of+aladdinPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22DE6 16772 bytes
SHA-256: f0e3ec600f4a547ed844c59cc32c0d54ba1982c420efec31863dddf042ccbc00
font_01_sfnt_off0002460b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2460B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00025e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25E18 3364 bytes
SHA-256: 5f8ae2da29451ea37e4583d8e5ceb7511ba788a4c2c8f02d8f95593750066a18
font_03_sfnt_off00026be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26BE0 21400 bytes
SHA-256: 6f10c37d542984eeb5f8f318c3091549c0f4beecea0b99d5df6ce42179a2b80f
font_04_sfnt_off0002a2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A2D7 10512 bytes
SHA-256: c61e7a99a45a0196f1a58388d25b09e9964e111ee1ec241db557493d3ff70108

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