Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8eb531d7d96a3cd…

MALICIOUS

PDF

68.1 KB Created: 2021-02-21 13:10:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a8a329c1216d66a9222e54ccde8a9ebe SHA-1: 78305b61f5a12d25de496ef2dc9e990b4c2aff9e SHA-256: d8eb531d7d96a3cd5bc55d1c94b2a3eee5cc65ebb114e29ebea96af8a08258c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier returned a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a phishing or malicious content distribution attempt. The embedded URLs, such as https://jacksth.ru/aws?utm_term=does+sonic+have+diet+cherry+limeade, are likely part of this scheme.

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 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.
  • 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://jacksth.ru/aws?utm_term=does+sonic+have+diet+cherry+limeade PDF link annotation
    • https://cdn.sqhk.co/viwiratoposu/lWKXhh7/stickman_rope_hero_2_game_download_apk.pdfIn PDF document text
    • https://wobereresexo.weebly.com/uploads/1/3/1/6/131606335/rozesonu-pusokagenefijag-lufopon-govufo.pdfIn PDF document text
    • https://cdn.sqhk.co/nufopusifa/ahjdric/aquapark_io_full_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/PTNOIgc/buxumiwoxajasep.pdfIn PDF document text
    • https://cdn.sqhk.co/pisimebuziz/hgkjfrG/genuni.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/jehbicg/christmas_snowball_fight_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/liregevo/hbTibje/jorudokurekugifazojesiv.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/ephzzXn/hero_honda_splendor_online_booking.pdfIn PDF document text
    • https://dewixazupeteti.weebly.com/uploads/1/3/1/4/131455636/gipariwo.pdfIn PDF document text
    • http://bazubufawe.22web.org/asus_laptop_k53e_drivers_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kejalupegem/jjjsVif/dash_till_puff_2_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/sikudile/UghnUia/35012907978.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/sojaxub/how_to_pair_jabra_freeway_to_phone.pdfIn PDF document text
    • http://nowutakifotekes.epizy.com/jipuximuxozarogelezoge.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/rulezadefinexevedesezem.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/i_like_me_better_musicpleer.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/47315785014.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_off0000cba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA1 5340 bytes
SHA-256: 81ca1df74140861a0d650ef1e1963e5827055b719a3ffc40ce4f5491226d08d6
font_01_sfnt_off0000ddb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB5 10928 bytes
SHA-256: a2d86686f3860cf1a048249cb49f9f9c886909401f3aa23955ff5967e89744dc

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