Malicious PDF — malware analysis report

Static analysis result for SHA-256 0634dbd32b0bfe56…

MALICIOUS

PDF

78.8 KB Created: 2021-09-16 23:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 5affa9b56ab53f84559521dec17fa929 SHA-1: ede17de4dcc35a179d65c8ceab2f52b8a2472fbe SHA-256: 0634dbd32b0bfe56aa95c256dbbe05c8402119a0535698c096a871a835c57ee9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links, including one specifically targeting 'insta hacks password free', suggesting an attempt to trick users into revealing credentials. The presence of multiple links on disposable hosting and compromised CMS uploads further indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=insta+hacks+password+free PDF link annotation
    • http://mydreamtuscanwedding.com/editor_up/3995372108.pdfIn PDF document text
    • https://soenen-pneus.com/upload/file/xiziwekimilekan.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/72340715428.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/83067371043.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/madaganeroxikupudon.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/vepeguvobude.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/e7qn8kgsv210ec32vcqr2pqp53/63176891322.pdfIn PDF document text
    • https://betsin.org/userfiles/files/49150160639.pdfIn PDF document text
    • http://www.seminariomenorvalencia.com/admin/lib/ckfinder/userfiles/files/sosavedikasalupigodidebub.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/6a7771d1c55d01d2f08f03e6e85469a2/41059419002.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/96081294921.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/rudufotanomisisidotenona.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/2214223314.pdfIn PDF document text
    • https://rapn.ru/ckfinder/userfiles/files/54115825267.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210911_D1FA75C1CD901F79.pdfIn PDF document text
    • http://rancholasmonturaspremios.com/campannas/file/zobixek.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1614350242d9c1---lakuja.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/gasadosuve.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/10561756343.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/natigovof.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/60682839786.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_off0000d172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD172 10708 bytes
SHA-256: 054ab5f23ba1e9291eb4c1af215cfbc7c9613a92a8598ea1f425626f5fece41c
font_01_sfnt_off0000ea0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0F 17028 bytes
SHA-256: ffc76afdda0d44f48d6cb33f1a2830ca50ceec809a701b96b6ffd4b1fd843f1e
font_02_sfnt_off0001160f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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