Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c2777b891fc9e5…

MALICIOUS

PDF

82.4 KB Created: 2021-02-14 23:52:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0436285edce48d2b914a6f16c8d52bd5 SHA-1: 7351efccd66eceba50e59ca4102748c408f1928e SHA-256: 66c2777b891fc9e54429bbcca40babec034570f23a1125f0f20b19a811e2597e
186 Risk Score

Malware Insights

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

This PDF file is classified as malicious and contains a large number of external links, many pointing to disposable domains or file-sharing services. The document body, though heavily obfuscated, suggests a lure related to 'how to size an ice axe', which is likely a pretext to drive traffic to these malicious URLs. The presence of numerous external links and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

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://druttle.ru/123?utm_term=how+to+size+an+ice+axe PDF link annotation
    • http://topstop.site/246986158240fhex.pdfIn PDF document text
    • https://pozusope.weebly.com/uploads/1/3/1/4/131453674/misagixezewagozuru.pdfIn PDF document text
    • https://cdn.sqhk.co/vojofarakiva/a1GNjhM/download_dungeon_madness_2_full_version_free_pc.pdfIn PDF document text
    • https://naxulukituno.weebly.com/uploads/1/3/4/8/134879135/fdc87.pdfIn PDF document text
    • http://blancop.xyz/53158148498sgo0s.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/ieENhaK/nail_art_supplies_online_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/kogoruzojif/jJmwh3T/bumubitarifixeborar.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxaroposa/ct82ijZ/58794216960.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/hcC5hVQ/jugepal.pdfIn PDF document text
    • http://cocobeautybar.ca/13978146614xpo27.pdfIn PDF document text
    • https://cdn.sqhk.co/nimabugokofa/Ihajijg/gizetik.pdfIn PDF document text
    • http://storeyou.store/vlookup_and_hlookup_in_excel_2020_tutorialh3nhm.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/hnjgo1R/nigitawosar.pdfIn PDF document text
    • http://fuwefepor.iblogger.org/9732257914.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/OQUxihH/abcmouse_app_bundle.pdfIn PDF document text
    • http://visionnew.xyz/fukulixakebulunonofc3.pdfIn PDF document text
    • https://ligapixoxos.weebly.com/uploads/1/3/4/3/134378271/sanoxobe_winew_javagigesov_sasuwap.pdfIn PDF document text
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/rebonuwax-pamabunoma-firodozukope.pdfIn PDF document text
    • https://regifedemez.weebly.com/uploads/1/3/1/4/131406591/2005a25b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vefuvepux.epizy.com/lubuvifokiruxale.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEF 4624 bytes
SHA-256: a23f8101b8e2e30f06a4f96d9dd5955e740ef73e6c3996bcb679a10308c0a60b
font_01_sfnt_off00010ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC2 10436 bytes
SHA-256: 3d162f5d91fcea4c888437bad4312227b5262dfc0eb8cace3a7a43d42246a645
font_02_sfnt_off00012e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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