Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae29fb1f9e07cee9…

MALICIOUS

PDF

79.3 KB Created: 2021-04-07 05:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d79a105f515ce94c6993901e6c33d9c6 SHA-1: 498c7f3ce544e56d34705e767ffd8bc240003bab SHA-256: ae29fb1f9e07cee98cde5cccdd4116b1d640398c1e20affe8d0059915cbba4f1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to boost SEO, and one prominent URL points to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=fagor+pressure+cooker+whole+chicken+recipe
    • https://ziganuridu.weebly.com/uploads/1/3/0/8/130815115/702e2aa.pdf
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/9e478f85b4e.pdf
    • https://jibanexoruna.weebly.com/uploads/1/3/5/3/135338247/duwixekitodotox.pdf
    • https://fadegedisumobe.weebly.com/uploads/1/3/5/9/135992854/7826789.pdf
    • https://bopamoverera.weebly.com/uploads/1/3/1/4/131408256/335ab6567c39d2.pdf
    • https://fasuwilobavofe.weebly.com/uploads/1/3/4/4/134489762/3b3cb3246.pdf
    • https://mesakarune.weebly.com/uploads/1/3/1/3/131380767/botet_topedube.pdf
    • https://rogubofiduga.weebly.com/uploads/1/3/1/0/131069879/9417929.pdf
    • https://zogazipo.weebly.com/uploads/1/3/2/3/132303407/valowukeb.pdf
    • https://mewasopaligesar.weebly.com/uploads/1/3/1/4/131454012/9611928.pdf
    • https://zuborezebakit.weebly.com/uploads/1/3/4/6/134638686/jakusebe.pdf
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/1fd3c50.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jifesu/english_grammar_and_vocabulary_exercises_with_answers.pdf
    • https://s3.amazonaws.com/degagaziv/manualidades_con_papel_reciclado.pdf
    • https://s3.amazonaws.com/tosego/is_part_6_of_jojo_confirmed.pdf
    • https://s3.amazonaws.com/bubisifapagefe/ala_baburao_dj_song_marathi.pdf
    • https://s3.amazonaws.com/penefelomiju/60311121865.pdf
    • https://s3.amazonaws.com/sezewu/who_has_prepared_thanksgiving_dinners.pdf
    • https://s3.amazonaws.com/palikuvexake/how_can_i_become_a_doctor_essay.pdf
    • https://s3.amazonaws.com/dobikasukavu/xidareti.pdf
    • https://s3.amazonaws.com/muxozuvalubi/types_of_functional_training_exercises.pdf
    • https://s3.amazonaws.com/nawosineromigi/92339025601.pdf
    • https://s3.amazonaws.com/dekogamik/24117086518.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f737.bin
f5331fdecf90f7e28008b7e8de45cd0d4135a1f4a7965cf11a1d563444ac7e31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF737 5308 bytes
font_01_sfnt_off0001095d.bin
fc44ba649ddd4857b3bc6932ec531f99f25a589534469b2d641f9aad830a7661		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1095D 11224 bytes

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