Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65850d821c3ccb6…

MALICIOUS

PDF

79.1 KB Created: 2021-03-17 06:05:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d79fbc2947d49f834125b0d0ceb67262 SHA-1: 900fc42a5f4ce4eb74b80a8f4ec490e0f2105931 SHA-256: e65850d821c3ccb63c7e00ac0e2c0fcfa57c86acb529da3f2029309bb5e9e9ef
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://gimoguvi.ru/wix?keyword=dog+beach+near+mount+pleasant+sc PDF link annotation
    • https://cdn.sqhk.co/nokikijun/idhdjjh/59104969804.pdfIn PDF document text
    • https://nujunilotup.weebly.com/uploads/1/3/4/6/134642651/sekadikatikokub.pdfIn PDF document text
    • https://jirakeleda.weebly.com/uploads/1/3/5/9/135992973/vatudeg.pdfIn PDF document text
    • https://xilasofuvi.weebly.com/uploads/1/3/4/6/134651230/b523843a772.pdfIn PDF document text
    • https://cdn.sqhk.co/zezinojox/hwjajYg/wifi_file_transfer_android_to_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/thjjj1q/xukafixenibe.pdfIn PDF document text
    • https://fezagigix.weebly.com/uploads/1/3/0/8/130813643/kominixemuren.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/gi0ijjj/87636078844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_60289ea00948d.pdfIn PDF document text
    • http://tovarajuxelogag.iblogger.org/4451803036.pdfIn PDF document text
    • https://cdn.sqhk.co/zokosofu/FiaSFh2/xenoblade_2_nia_costumes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486537/normal_60517fa29a865.pdfIn PDF document text
    • https://vosumizajemuji.weebly.com/uploads/1/3/4/0/134041682/3063887.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450042/normal_5ff338c16d6e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426549/normal_5fe0f8c82a867.pdfIn PDF document text
    • http://juzibekemuvur.iblogger.org/piano_finger_number_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://keputeka.epizy.com/15477816662.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/lejuted.pdfIn PDF document text
    • http://putojoner.rf.gd/98349841076.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/pentair_fns_plus_48_backwash_valve.pdfIn PDF document text
    • http://tizoxojuragato.epizy.com/cakephp_tutorials_point.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/physics_electricity_and_magnetism_cheat_sheet.pdfIn PDF document text
    • http://popewap.epizy.com/16549419015.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/ximasunak.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/chatbot_platform_for_whatsapp.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42C 5488 bytes
SHA-256: ce2187c5397eda1e729ba2050ba9c86834d4297b64e1ee23a262be9268d8d121
font_01_sfnt_off000106ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AD 11324 bytes
SHA-256: 77ec9100eb1f4e8080875f8858ebfc8d321e04a28548077ea9274cf7f23706c4

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