Malicious PDF — malware analysis report

Static analysis result for SHA-256 08022c4a49279928…

MALICIOUS

PDF

89.2 KB Created: 2021-03-11 05:58:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 18fd4b96cc78a0578b9dcbd16939ad48 SHA-1: 582beb0b873d45851536062d365a7bb0bbc20072 SHA-256: 08022c4a49279928172c33177e8b430f55dcf0cf5b9da49e5970317ceb3dd558
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/award?keyword=ges+cost+accounting+syllabus+pdf PDF link annotation
    • http://ritixabig.iblogger.org/9019081983.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463263/normal_5fcbbae33aa98.pdfIn PDF document text
    • http://rezltml.xyz/can_t_spotify_from_windows_storem0kg9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465690/normal_603869cb71607.pdfIn PDF document text
    • http://astrology-personal.online/74652410646exnfo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463533/normal_603cb20cb98cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421335/normal_5fe7f11d4481e.pdfIn PDF document text
    • http://torchland.xyz/kiponokekasazunuvesereuy9ki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zagubip/30300995611.pdfIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_61e16d4dd94c4ec2ad30798de2ad0521.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tenunud/how_to_report_bigamy_in_texas.pdfIn PDF document text
    • http://dikokek.epizy.com/gpsmap_62st_bedienungsanleitung.pdfIn PDF document text
    • http://guradewididexep.epizy.com/bgclive_app_for_android.pdfIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_47a0dfc001f44641842ec131c599288c.pdf?index=trueIn PDF document text
    • http://savuxerekeze.epizy.com/canon_pixma_mp160_scanner_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/mibugerabelogekevo.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/aghori_hd_images.pdfIn PDF document text
    • https://7b806e58-2e0f-4c22-b5e1-e0f71c4d6e86.filesusr.com/ugd/8da65f_4339788582c143b7b2c0625c3434d74e.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11044 4248 bytes
SHA-256: aeb848e913e67413d64604beb8b3690fed33de8013feb814b1e8485910c24476
font_01_sfnt_off00011f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F26 5500 bytes
SHA-256: a691eb4518dace2501dc3e600ab6b0d2c047489735d411260e63cefacace4254
font_02_sfnt_off000131fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FE 10964 bytes
SHA-256: 64f7a8a41eb8faeca217a72272664b9945eddabb350b46e37594f6f690d38cbd

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