Malicious PDF — malware analysis report

Static analysis result for SHA-256 69edf9c686d793a4…

MALICIOUS

PDF

75.5 KB Created: 2021-03-04 12:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0d69a618ac2a3b29f1577ab2c1d6d492 SHA-1: cebbfdc577eb955b2cd09429cf32d0bd3e4e9bd8 SHA-256: 69edf9c686d793a4ba66b21c7485ea1fceae9e1019a0da882ec4c638fa2eb511
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains references to 'Blue jackets current score', likely a lure to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/123?utm_term=blue+jackets+current+score PDF link annotation
    • https://cdn.sqhk.co/tinulafi/5uifqgd/jiwazujurolu.pdfIn PDF document text
    • https://mofibowego.weebly.com/uploads/1/3/1/4/131406437/bddaeb23be3b82.pdfIn PDF document text
    • https://zibakuponitek.weebly.com/uploads/1/3/5/3/135303957/fobimosaxepifip.pdfIn PDF document text
    • https://manadazalivufud.weebly.com/uploads/1/3/4/3/134358645/ruzesawuzo.pdfIn PDF document text
    • https://virigegeke.weebly.com/uploads/1/3/2/7/132740897/nafuj.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/gcgh5ja/kedup.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/vuY2ib7/meezan_bank_car_leasing_calculator_pakistan.pdfIn PDF document text
    • http://mitidogifomasis.iblogger.org/87022718511.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/1NMgifW/the_realreal_reviews_glassdoor.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/hjf7ijm/jidunevevadusatekunag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://titunika.rf.gd/1979_evinrude_9.9_water_pump.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/wedding_invitation_card_template_blank.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/avatar_the_last_airbender_movie_2.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/blackberry_classic_android.pdfIn PDF document text
    • http://zavinawotomuvef.epizy.com/16350810277.pdfIn PDF document text
    • http://sosedowogizobi.rf.gd/apostila_blender_2._79.pdfIn PDF document text
    • http://jigiwema.epizy.com/jafejelopuwesumixo.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/53114460222.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_off0000e6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C6 4980 bytes
SHA-256: 1956985a306b8346eba24604822f0f5112d59ff5cef2df9875b35577be773e40
font_01_sfnt_off0000f7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CA 12184 bytes
SHA-256: ec9ef293f12022f1cf0c024d7fd3ffd05e59ed3a3ef8f96c92ad0005d2f75657

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