Malicious PDF — malware analysis report

Static analysis result for SHA-256 9249a044d69a224e…

MALICIOUS

PDF

76.7 KB Created: 2021-04-10 00:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0cdabcba3dd0ecc6ae63673f65b4d4c4 SHA-1: 2c14e19022a9864cf626690cd3e5c4831f28aebd SHA-256: 9249a044d69a224e52bad0893879071538731b9f5f100b1dfadbc6055b405a7b
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 pointing to disposable domains, suggesting a link farm designed to host malicious content or redirect users to phishing sites. The primary URL, 'https://mezovuduw.ru/strik?utm_term=amazon+echo+show+user+manual+pdf', is presented as a search result, likely to trick users into clicking. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing and potential malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://mezovuduw.ru/strik?utm_term=amazon+echo+show+user+manual+pdf PDF link annotation
    • http://datinge.site/132501592084j7xe.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/b5d743ab00d.pdfIn PDF document text
    • https://benefirezunaxo.weebly.com/uploads/1/3/4/8/134864331/jijagiwodeso.pdfIn PDF document text
    • http://japadeja.22web.org/how_to_make_fake_insurance_card_app.pdfIn PDF document text
    • http://bionatur.space/why_is_my_onan_generator_surgingl9itw.pdfIn PDF document text
    • http://tegor.xyz/373078554847z907.pdfIn PDF document text
    • https://mixozanuzobese.weebly.com/uploads/1/3/5/4/135400893/5943073.pdfIn PDF document text
    • http://befelofote.iblogger.org/39905773878.pdfIn PDF document text
    • http://themarkuzmusic.com/katobosewolizijideju4wnhd.pdfIn PDF document text
    • https://larezonisu.weebly.com/uploads/1/3/0/7/130738889/sunikuz_rifax_vovokeje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c660c94-9828-4c0d-a447-0389263e48a1/how_much_did_michael_burry_make_in_the_big_short.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b37dc8-225b-48e3-aacd-132d24b08292/dake_bible_review.pdfIn PDF document text
    • https://99f4a897-b223-4833-863a-50ad465ba5d5.filesusr.com/ugd/8e2371_11b30322baa84febbfbd914f7d9919e9.pdf?index=trueIn PDF document text
    • http://zobadobu.epizy.com/descargar_musica_de_frankie_ruiz_mix.pdfIn PDF document text
    • http://mimiwuzoxul.epizy.com/kobalt_8_gallon_air_compressor_parts_diagram.pdfIn PDF document text
    • http://kugexuluke.epizy.com/smith_normal_form.pdfIn PDF document text
    • https://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_de2bcd6230f14f178c0ac74370b959db.pdf?index=trueIn PDF document text
    • https://09ec27ad-13b2-4d6a-9bba-a73d40af2dac.filesusr.com/ugd/309646_15d74ed998a24380a81ac75d46d27c59.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d80d5556-3d44-4e6f-b6b4-5f2a08ecfbf6/38403503512.pdfIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_de6c49dea40b4413b953d85ca53380b0.pdf?index=trueIn PDF document text
    • https://e39bfc17-a898-4016-ac91-fc9303c112df.filesusr.com/ugd/b5068a_eafa558d163e4a979d34448700072d79.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC23 5528 bytes
SHA-256: d51bf20890d882b93ae22116e7c885fe6666db0ee236d5732ddeb61440540c81
font_01_sfnt_off0000fedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDB 10888 bytes
SHA-256: a979fb608af6163b3b8372fb21d0b7521300b856cda8c14039d95bf7d0c5443c