Malicious PDF — malware analysis report

Static analysis result for SHA-256 9beb2f6619ae5303…

MALICIOUS

PDF

120.9 KB Created: 2021-07-07 07:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22073b847aac4e596b88ce13a0c24b67 SHA-1: e3b9dbd1bd0d00ec5049c5fc6da40b4ff3a2af51 SHA-256: 9beb2f6619ae5303411f7ec2c3970f23f6237ec5b2a73bd27356fa19683021e6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a malicious PDF by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content or engaging in phishing. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests a common tactic of encrypting payloads and providing instructions to bypass gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/d73edf840c4da2e949848d402f4f7674/wuxunepuxozigeza.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946b6d8a8b8---ninegomaxutoj.pdf
    • http://lycee-elm.org/userfiles/file/dibifowunup.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f17f29df1---1195534030.pdf
    • http://xn--80aikni6a0b.xn--p1ai/images/file/zododoso.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/65oipdd8ik5iikev75qvogqal4/kesafevofezo.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aced95a6a1b---88700157652.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f420b08e1b---7886774654.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/510f3b1f5f288f3bbdc8dd2a3e6ce895/91836706816.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/151a90ef5997841da07717557f680475/kokel.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/6aed0309afb27d278caaefea31a45f4e/71544880351.pdf
    • https://mmszke.hu/files/file/6752305292.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098321ae71af---risexetelo.pdf
    • https://anpheatingandac.com/nbloom/fckuploads/file/poxinepitox.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/9nv02o4pahihlq93kh1c1pbnsj/zirusas.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/5af896236cbd2fd3f78b8bb88e5c75a7/zebaxoreme.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901cb3cbc5f---wabejoravepepuxexonukizuz.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/5c4c1ff56c5975727395b575c58e01c6/54051527755.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d68685a8a---menojiwaruw.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/f3e04156597590ac3e6e9f2a995c98db/35631771535.pdf
    • http://trendymamy.pl/userfiles/file/43455736785.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/gar3mq6ug010e3mq3af8vtgfk4/kekasifazuruxujesa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=the+sim+card+inserted+in+this+iphone+is+not+supported
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000173dd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x173DD 16792 bytes
font_01_sfnt_off00018bf4.bin
306a25e2f3d83c761499163700386da9212a5d8b4e1b84476c2869408bd90637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18BF4 10796 bytes
font_02_sfnt_off0001a4a3.bin
99f764ff47511e712508fc0c92b948500dc0e8a37a035329fd503fa150f388e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4A3 18664 bytes

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