Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca57f34a094b8ae…

MALICIOUS

PDF

80.0 KB Created: 2021-03-29 10:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 144752553901ea0b688c06c2fa01877e SHA-1: 04a69a0349bf97267dba7dfdd03197bbd44555ff SHA-256: 0ca57f34a094b8ae74c0c63ca9a9cdfafcc717b4c5b87eebc1a87d35067a0132
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that redirect to a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a malicious payload. The document body, though heavily obfuscated, appears to be a lure related to product reviews, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=masterbuilt+40+electric+smoker+bluetooth+reviews PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412159/normal_5ff133287d365.pdfIn PDF document text
    • https://kifoguwo.weebly.com/uploads/1/3/1/3/131383532/gewewelusefiriv.pdfIn PDF document text
    • https://cdn.sqhk.co/narivujuraf/Rgif1hi/maxajaze.pdfIn PDF document text
    • http://opensol.xyz/arithmetic_sequence_worksheet_1_answers9ymrp.pdfIn PDF document text
    • http://itrom.fun/practice_8-3_multiplication_properties_of_exponents_answer_key695nc.pdfIn PDF document text
    • https://cdn.sqhk.co/xawesani/wjhBg4T/craftsman_gold_6._75_lawn_mower_190cc_manual.pdfIn PDF document text
    • http://wordwild-store.com/61445588064nnvbm.pdfIn PDF document text
    • https://cdn.sqhk.co/xogixute/vijeUhc/spiralizer_recipes.pdfIn PDF document text
    • http://baltika-trans.com/spanish_short_stories_free_downloadsua29.pdfIn PDF document text
    • https://lobixeximoruse.weebly.com/uploads/1/3/5/3/135319822/78d12cc4523b.pdfIn PDF document text
    • https://buderenedisam.weebly.com/uploads/1/3/5/3/135302361/rezoves-dozopijuki-xijusopitipok.pdfIn PDF document text
    • http://teplotronic.ru/fekurokexrzv1g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485702/normal_605cf3535a0c2.pdfIn PDF document text
    • http://thechambre.xyz/battletech_board_gamev8v57.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Goge6ib/lean_bulk_workout_plan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393370/normal_6054db959fb96.pdfIn PDF document text
    • https://fenatafu.weebly.com/uploads/1/3/1/6/131637570/bekibobazusaz.pdfIn PDF document text
    • http://healthyforczechrepublic.site/safelodusewusuduvakinnef88.pdfIn PDF document text
    • https://dexekuweda.weebly.com/uploads/1/3/4/7/134705305/dovokokisizewogesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_602b3ab90cd35.pdfIn PDF document text
    • http://storeeu.info/2006_ford_f250_super_duty_oil_change89prv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503787/normal_600906da6d5e8.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/gixirojozogufux/florida_birth_certificate_apostille_form.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/best_book_to_learn_thermodynamics.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_off0000f80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80F 5628 bytes
SHA-256: 9f57552abad67169142693c5d6a2c831176df3c098b9bbf4388219c9d3a80894
font_01_sfnt_off00010b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2C 11012 bytes
SHA-256: 9ec2293adc2b49de0ffe1e3f599b58b16b746605f2588fd1d0cfaeef16016ab7

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