Malicious PDF — malware analysis report

Static analysis result for SHA-256 036b2d429dfa8ef7…

MALICIOUS

PDF

105.1 KB Created: 2021-03-03 19:35:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b1fbbbc777baa73cebeef203bc22dab1 SHA-1: 5d1838fd5d144041fbaac57db5bf4f4eee61a23a SHA-256: 036b2d429dfa8ef7367767c339693937d256809c81be4b0e2b507340d53737b1
186 Risk Score

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. 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/123?utm_term=online+excel+sheet+jobs PDF link annotation
    • https://woxogobigevi.weebly.com/uploads/1/3/0/8/130814596/zesijidok-nuvavagod-segijukuw-luvogejovaluti.pdfIn PDF document text
    • https://cdn.sqhk.co/pixorikibam/eidhgG0/xipuzebagisuwimuvetekipot.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/igcgehb/juvumepalezemuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/WLgfhfr/free_animal_jam_play_wild_codes_2020.pdfIn PDF document text
    • https://torobekaxiwe.weebly.com/uploads/1/3/1/3/131380482/9f670e8f2b305d.pdfIn PDF document text
    • https://retotanenumu.weebly.com/uploads/1/3/4/0/134017544/bewuluxopadono_suzirobawilari.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/bu3igCE/68352499029.pdfIn PDF document text
    • https://zeloruzo.weebly.com/uploads/1/3/5/3/135349371/9186265.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/tgdNk7d/overkill_3d_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zepaginu/ZjhogcD/ted_bundy_netflix_documentary.pdfIn PDF document text
    • https://cdn.sqhk.co/lukisebeka/jgIogg2/41833766657.pdfIn PDF document text
    • https://cdn.sqhk.co/ridijafugemi/crPidO8/57631502573.pdfIn PDF document text
    • https://cdn.sqhk.co/naxokujim/6ib2jgW/riwixepe.pdfIn PDF document text
    • https://biziliwedurukax.weebly.com/uploads/1/3/4/8/134889104/a52580.pdfIn PDF document text
    • https://jedagafigi.weebly.com/uploads/1/3/1/4/131438055/f4cdbed0827.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/putedut-mawodunome-jelix.pdfIn PDF document text
    • https://zikazofikadit.weebly.com/uploads/1/3/0/7/130739129/vawebi-bapad.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/natewared/87136845955.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/ae_transition_free.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_off00015fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FBD 4892 bytes
SHA-256: 26280fda5d635f9d12b2d324adfab2e4d444036ab0c62087bb64371635fb2c06
font_01_sfnt_off0001706b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1706B 11452 bytes
SHA-256: fa1a8c98e23ba6da9879243b15c5664c45e1f965adbb2a07e88682a707f46332

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