Malicious PDF — malware analysis report

Static analysis result for SHA-256 75af29f9ce69278b…

MALICIOUS

PDF

89.0 KB Created: 2021-08-07 13:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8ed49bff86f5b9aa6324cec89c617a57 SHA-1: bacebb07a227e36c27f6636a5b9e336cf0e05c71 SHA-256: 75af29f9ce69278ba288f5c3987c51ed7c620708c4284d2aab49132ec72ce9fb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The presence of a 'callback lure' heuristic suggests the document may prompt the user to call a number, a common tactic in tech support scams or phishing campaigns. No scripts were extracted, but the overall structure and URL distribution point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • 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 https://huntic.ru/uplcv?utm_term=how+long+to+prepare+for+comptia+security%2B+exam PDF link annotation
    • http://eszixv.hu/ckfinder/userfiles/files/tuvitowinizulezamowi.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/43008058576.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16078cb512fb12---71078225063.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vtlmdiup6k1ka96ru6ep502jv1/livim.pdfIn PDF document text
    • http://whitepurdeespires.com/clients/b/ba/ba703c466af5784ee38134b9d09df413/File/maderil.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/45070504163.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/67493853830.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/1ebe9d57dd8ef0deac1e253c0628a95a/80278467632.pdfIn PDF document text
    • http://nhs71.com/clients/d/d9/d9c6bfbc4bbdd207836d30c01fe5869c/File/63870469029.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021051600585873499.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/d26f87b35f161cfb6cf264bdd28af5e1/gabenax.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608acab90606f---kikafexizuvatu.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/37069483719.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/70011721268.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/renumawegagi.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/pixukezosilowiw.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/dee0ad5191bc68f5a4128eec90b54cc5/68311221995.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdd81b1de3---56900240439.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/42123978844.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/k2dsv0t80ne0nkufi2p3spjnoi/45170882602.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce4ece4550---nogurazatejekapulutowuzef.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/28007352522.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/9062414802.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_off0000f0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10908 18456 bytes
SHA-256: 13bb3ec0fd1629660137563bc71dae45c853fe9bd97419a19ea0e3baf263f9f2
font_02_sfnt_off0001389c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1389C 11216 bytes
SHA-256: f9edde58d2560d21ac4b499d097acd01a710861a3e0e263b5d594a9129df0367

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