Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7e60f4d4125eba…

MALICIOUS

PDF

80.5 KB Created: 2021-09-01 15:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fc1612f412e9dd7b9d7b45f04449b794 SHA-1: 77b37e3b8551e964715aeb7f3b79c6bfe21d2aa3 SHA-256: 7b7e60f4d4125eba6c9357b2700bfbc42d0505ab5fdf3727a85a6b0c3d8944fb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS upload storage or disposable hosting. The 'SE_CALLBACK_LURE' heuristic strongly suggests the document's content is designed to trick the user into calling a fraudulent phone number, a common tactic in tech-support scams and callback phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://benetalent.com/upload/files/61621922068.pdf In PDF document text
    • https://arab-hams.com/Ups/files/39784739212.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbfd68c6bd---tosavabadujatugi.pdfIn PDF document text
    • https://vestol.bg/files/file/gazuvotomelebejudu.pdfIn PDF document text
    • https://mkontakt.pl/dat//file/sutukenufiruvirefofe.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a230aece012---95535030546.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1678b53851---xugobelovamabepid.pdfIn PDF document text
    • https://33mobility.net/uploads/files/lesag.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867da5d2928---mapazajoz.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/39dc85bbf7e706cbf8dc711261c460ca/54039964880.pdfIn PDF document text
    • https://jdlpartnerss.com/userfiles/file/8986693182.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0261107001621537788.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/3b3c357c15509aa5f728f2a53f4c5b45/perosuxiwitela.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/bomuzosowixa.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887f7f5ea46---ginomemijewikuvujupofije.pdfIn PDF document text
    • https://anakaygame.com/calisma2/files/uploads/3399623221.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/sefapududukowivito.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/a536e81b2a1d624f88a1fd61dbebf3e0/pigolajodulowozibivugibe.pdfIn PDF document text
    • http://ymjgolf.com/file_media/file_image/file/luwabivamaripajafosixobe.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/b3e07f9ef67ffa91de91a241a416fc8b/40529862224.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16085d88c958e2---74384736767.pdfIn PDF document text
    • http://amandamaitland.com/images/file/xobem.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/413rrid63lv7f9q64a1p57o44c/fixupoluje.pdfIn PDF document text
    • http://artospace.com/pics/file/28233745527.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=play+50+cent+21+questionsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E9 10912 bytes
SHA-256: ac1bc7b204d8ac03b22a05279a6d4fbfca76ba72e0ff3ba0d39961ccedbf98ab
font_02_sfnt_off00010389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10389 18268 bytes
SHA-256: a1205eaf06d5fb1d4ac4018d2a9be455d153cc0fe56367e4050c1d34340dfa9b

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