Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c292139595a94f…

MALICIOUS

PDF

100.1 KB Created: 2021-06-29 05:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6beb36fd9adce4b545257e6d079d3411 SHA-1: 05c2b89f60f56211d574b26ab9fb9f60896bd964 SHA-256: f0c292139595a94f957b3ad5107188184480ecb76482e8b18bcc80be31e98d46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a machine learning model and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The file contains numerous embedded URLs pointing to compromised websites, suggesting it is designed to lure users to malicious content or downloads. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=3+double+letters+in+a+row
    • http://ash-graphy.com/userfiles/file/21597545335.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/ub056f6qnat252gtartk8gm6b3/riduxagasolevuj.pdf
    • http://lighthouseofworship.com/clients/44803/File/todufubovokelavid.pdf
    • http://accessiblevehicleservices.com/userfiles/file/xinesobutifemaf.pdf
    • https://menlopark.com/wysiwygfiles/file/lekabivolarimorokituloxu.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160d439fb31979---27945348851.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/3e60076d30d6a8c18939ee46bdcf9271/timiwavunejuz.pdf
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/1c1b5965fe8a0e8cdfe77b524c67e922/78683230996.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/dd9c0b0512a7ae927fcf3980f3b3d459/40547994862.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/7680bf513ea944b450978c02a28daea8/28440106662.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160793100c1587---pevedas.pdf
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/51940975728.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/ek0bcdrf5bnuhds00442mfgt5u/mevaxi.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/5f5b2f56214aecb5d589dc1f2aa3086c/20734745287.pdf
    • http://knuhpharm.kr/userfiles/file/20210625055449.pdf
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/63181248382.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1a2a6eeb2---27473044903.pdf
    • http://sieuthivatlieuhoanthien.com/upload/files/wewak.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/fumruilfa2co3qcfandm573juf/wirivenojukava.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089bc7bd40b9---xunupapidajinan.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160853c9d6f50c---10681789454.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739d4b3d9a3---40045202160.pdf
    • http://digjamaica.com/app/webroot/files/62844730841.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/41d2f1a0eea8b160787d6bb6b5b53225/1682051176.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d002c52b190---59609471738.pdf
    • 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_off0001217b.bin
e4976e29840ef322635c7e5623d54d5be20cddf8c47383a1697407d1f1248e02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1217B 10644 bytes
font_01_sfnt_off000139fa.bin
3041ba96e35942f65956aa7831cb2baef1f288fc13ee3d16686a0523d9df5728		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139FA 19040 bytes
font_02_sfnt_off00016b1e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B1E 16792 bytes

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