Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7f475cbf44e9be…

MALICIOUS

PDF

79.8 KB Created: 2021-03-03 07:00:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 47b5aab1b30ff6428d99b9212e6c15ed SHA-1: f0cb136b8ff0cb3443f5e02b87f3f82648546d09 SHA-256: db7f475cbf44e9be119ea5bc4f29acdbe97853f8e7f311eef81c1ce2e52b98a3
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to making money on YouTube, which is then used to direct users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=how+to+make+money+on+youtube+beginner%2527s+guide PDF link annotation
    • http://wiinorama.website/730193491769nnfg.pdfIn PDF document text
    • http://hookup157.site/como_agua_para_chocolate_que_significas534k.pdfIn PDF document text
    • http://help-igcopyright.xyz/benewefiduvakanigm8k1.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/oRge8ij/kaiju_rush_all_eggs.pdfIn PDF document text
    • http://prizinsta.online/how_to_port_your_mobile_number_to_airtel3hx9p.pdfIn PDF document text
    • https://retenosarubus.weebly.com/uploads/1/3/2/6/132695405/dezixefapefe-pejeli-mevenukufifis.pdfIn PDF document text
    • http://buyfastedcircle.xyz/73517824306egh6o.pdfIn PDF document text
    • https://wibidonegaka.weebly.com/uploads/1/3/4/5/134599285/8cf4b2ab2852cb.pdfIn PDF document text
    • https://lasogevedona.weebly.com/uploads/1/3/1/3/131398076/demovu.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/f2ib9hh/pibalut.pdfIn PDF document text
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/2392140.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/1sihiaT/90177566152.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/saeco_espresso_machines_costco.pdfIn PDF document text
    • http://reestr.site/32699358008ihxc4.pdfIn PDF document text
    • http://dijepeg.22web.org/18794981358.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://wevevaviz.epizy.com/97821169025.pdfIn PDF document text
    • http://vugugemo.atwebpages.com/how_to_apply_for_pregnancy_medicaid_in_ga.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_off0000ec07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC07 5388 bytes
SHA-256: 2ca929a86ea6fef3b7234e3071f8c51029f6e88cb5f4a190fe15e56f1128e11a
font_01_sfnt_off0000fe55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE55 10824 bytes
SHA-256: f0db368d0291e4df02654a17a3074a2bcf3a17cec3a919a65fc31b0c97f4220c
font_02_sfnt_off00012377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12377 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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