Malicious PDF — malware analysis report

Static analysis result for SHA-256 a702fe9035ee310d…

MALICIOUS

PDF

74.3 KB Created: 2021-09-19 13:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 1ba2af814864ded7ff757887c3c79658 SHA-1: 13da22ea8cdc2f292fc8527f62b95e2e9528fc7f SHA-256: a702fe9035ee310decc79a980fe41d45e97d3295d709cb9500c8e8dd679c182e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting, and it contains a callback lure consistent with phishing or tech-support scams. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to direct users to malicious content or initiate fraudulent interactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://allytemp.ru/uplcv?utm_term=how+to+view+private+instagram+account+2021 PDF link annotation
    • http://erulingua.hu/uploads/content_files/files/81996148589.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210903101935.pdfIn PDF document text
    • http://www.rajpuc.pl/pics/file/resiveke.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/e64581875521113ac28d3bedaab577da/36004800456.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/68568705309.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/fulololomubufujiluxu.pdfIn PDF document text
    • https://kokomanis.com/contents/files/jofaxukowujisoro.pdfIn PDF document text
    • http://hanstime.com/userData/board/file/vesuziwa.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf10b1a378---gukarisajeloketud.pdfIn PDF document text
    • http://bhartiyambeohari.in/userfiles/file/riwebatogupirilenurozu.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/61007a5b885c6b30538ee5fba79bca60/86657099467.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613947348dda4---78318986077.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/denutotejomi.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/84250596674.pdfIn PDF document text
    • https://micro-logic.ro/images/uploaded/file/tipadik.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/tisobuginikitizifikixek.pdfIn PDF document text
    • https://henuopack.com/d/files/93856769334.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/tazekimufer.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/5e38a3547a2a053c184047b0acd97a88/digatosalewenewupab.pdfIn PDF document text
    • http://ambulatorioveterinariomariani.it/userfiles/files/73135362899.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/7120260869.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/75491482733.pdfIn PDF document text
    • https://konteshamamotu.com/userfiles/file/27147779947.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_off0000bdc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC7 16788 bytes
SHA-256: be04470c9a0e66751df45dbc1b57c22ce98156f4e1723e18116e0ee1cd791c31
font_01_sfnt_off0000e936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE936 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001014d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014D 11208 bytes
SHA-256: 13ab2907a1a4302dabfe0135a2d0fea5bdadaf6dd786f9aad75255bb75d1de33

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