Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9a70aa3a2eb22b…

MALICIOUS

PDF

78.6 KB Created: 2021-01-30 05:26:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0af24118ecb1b22727dfe26eb65d3ece SHA-1: c0273c7f1b80488096f1de51a8e0a2a678251cb1 SHA-256: af9a70aa3a2eb22b86923fa8273f16d368babdd8237d01a375f0589030171c40
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. Although no scripts were explicitly extracted, the presence of external URIs and the ML classification strongly suggest malicious intent, likely to redirect users to malicious content. The document body's content, though heavily corrupted, hints at a lure related to 'key and peele skits list'.

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/123?utm_term=key+and+peele+skits+list PDF link annotation
    • https://kazowajobizitat.weebly.com/uploads/1/3/0/7/130775795/c4732ed066.pdfIn PDF document text
    • https://bonomomu.weebly.com/uploads/1/3/0/7/130775928/2973020.pdfIn PDF document text
    • https://bifixebuwo.weebly.com/uploads/1/3/0/7/130776276/favazegitaga_damizemake_fizekakowavi_nejatopagarir.pdfIn PDF document text
    • http://wedogadev.iblogger.org/android_forum_app_source_code_github.pdfIn PDF document text
    • http://javebamugizal.66ghz.com/apex_legends_ps4_control_guide.pdfIn PDF document text
    • http://sofebitaxed.iblogger.org/agni_parthene_sheet_music.pdfIn PDF document text
    • https://xakolino.weebly.com/uploads/1/3/1/4/131453712/xidikaze_jofologesi_dumazixuno_pafofetuluxavo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nemunuj.rf.gd/senuloxegim.pdfIn PDF document text
    • http://jasukerubupir.epizy.com/fujirevixodukopidoda.pdfIn PDF document text
    • http://mewobunodume.rf.gd/conversion_metric_worksheet.pdfIn PDF document text
    • http://rowagaparik.rf.gd/kukederojanewesazikifo.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/koromegulerexodimukux.pdfIn PDF document text
    • http://letozin.rf.gd/lexozevevonaroxixej.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_off0000f854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF854 4992 bytes
SHA-256: 36070f1ef468733e5768e16bd6c2fbe8e47735cd4e26c97ef79d35b1d3d2b131
font_01_sfnt_off0001096f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096F 10632 bytes
SHA-256: f4f3d988195142d0b63ca731764e013e6921ccf1ab635bcd647dc62690105fc2

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