Malicious PDF — malware analysis report

Static analysis result for SHA-256 b747e2f2295553ab…

MALICIOUS

PDF

73.4 KB Created: 2021-02-04 10:59:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c7ba91221ad3d0b80b49921e591b38ea SHA-1: 3c403387ee92ef17036f8385d6fd873ae00316b6 SHA-256: b747e2f2295553ab54d3521322a856ae57eb0d0986d7b8b1be2af43865764b36
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or scam campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/123?utm_term=weight+watchers+digital+scale+reviews PDF link annotation
    • https://cdn.sqhk.co/mafowixodi/gijaVja/celebrity_quiz_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/giz00ha/free_stuff_craigslist_chicago.pdfIn PDF document text
    • https://jomagikovire.weebly.com/uploads/1/3/1/4/131408086/4364195.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/fDpxhaW/54190606273.pdfIn PDF document text
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/dba576925b56eef.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/Zsgegih/vejig.pdfIn PDF document text
    • https://topuzuxet.weebly.com/uploads/1/3/0/7/130739133/f6b0cd879164.pdfIn PDF document text
    • https://fedalovojuxunod.weebly.com/uploads/1/3/0/7/130775560/2327962.pdfIn PDF document text
    • https://xufodikufidu.weebly.com/uploads/1/3/5/3/135382923/givunoviwijipen_muzujen_zubiso.pdfIn PDF document text
    • https://tesajezu.weebly.com/uploads/1/3/1/4/131452821/mowan_rarovuwabunu.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/JRjareK/10604295502.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/sibigpH/megasapenajuxomobalen.pdfIn PDF document text
    • https://fevowavekotaxuw.weebly.com/uploads/1/3/4/6/134635114/zarugifelufeseke.pdfIn PDF document text
    • https://naxomusiji.weebly.com/uploads/1/3/1/6/131606859/9240222.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/CJPvsid/kanto_region_map_pokemon_deluge.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/ezkFwjc/51296466429.pdfIn PDF document text
    • https://xunopigiwigon.weebly.com/uploads/1/3/1/6/131636761/8468669.pdfIn PDF document text
    • https://poxejoretojav.weebly.com/uploads/1/3/4/7/134740271/buxoxinadebotokojegu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zijodere.rf.gd/arabic_remix_song_2017.pdfIn PDF document text
    • http://lukigek.rf.gd/peweduberalixuvebajoxuni.pdfIn PDF document text
    • http://jasetaroxakil.rf.gd/26013926849.pdfIn PDF document text
    • http://tefesapebeto.rf.gd/show_intro_after_effects_templates.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_off0000e049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE049 5368 bytes
SHA-256: d838b9672674a6bb7264894a74f8b47994fd724b50a2816e78df4a016beb93bc
font_01_sfnt_off0000f2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A2 10980 bytes
SHA-256: a73dd10379eaff10ab61441b82235107ec41e9f70cf5212979fdbcbad9461c7e

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