Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5d22c408cee790…

MALICIOUS

PDF

75.0 KB Created: 2021-01-12 01:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: cf0bc595cd75743e63e7cfa827491b92 SHA-1: 97eaccf5d7f6f64435d267c499591faa6f154d24 SHA-256: 0c5d22c408cee790e3a6ab4baab52dbe0c21cd7cea5108335dcd2319cfbb4ae8
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, characteristic of a link farm used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to malicious sites.

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://trafftec.ru/aws?utm_term=automatsko+upravljanje+knjiga+pdf PDF link annotation
    • https://cdn.sqhk.co/doxufojixene/jehatZD/voice_changer_audio_effects_mod.pdfIn PDF document text
    • https://zerimesatevig.weebly.com/uploads/1/3/4/8/134879836/a8fa4fa2567bc.pdfIn PDF document text
    • https://cdn.sqhk.co/wemegofuk/hibgd5n/automatic_tennis_ball_launcher_dog_toy.pdfIn PDF document text
    • https://cdn.sqhk.co/kulizuxekume/hahbifZ/15489289580.pdfIn PDF document text
    • https://jonurimexiv.weebly.com/uploads/1/3/4/3/134321783/vepuvidobo-mewejime.pdfIn PDF document text
    • https://wutiboduselojo.weebly.com/uploads/1/3/4/6/134665342/rugon.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/583960.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/hihVjdW/55922611187.pdfIn PDF document text
    • https://cdn.sqhk.co/daxozazon/jEy84hg/6385422087.pdfIn PDF document text
    • https://nesipemuwazona.weebly.com/uploads/1/3/4/8/134881126/wonazimana-kidomugen-xofitatafenikov-darafefaxamaj.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/495735c5c.pdfIn PDF document text
    • https://wizisenax.weebly.com/uploads/1/3/4/3/134320615/wisivanawomozi-gowasebolodadu-zefomiseno.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
    • https://s3.amazonaws.com/wujixus/vepomodojaju.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/alabaster_sheet_properties.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/8430902723.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/blanch_condensed_light_font_free.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_off0000dc4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4C 5432 bytes
SHA-256: 909780c585bff6c682c9cc53725798824cd13105a3b0b44668c2cdb515bb179b
font_01_sfnt_off0000eeba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBA 9936 bytes
SHA-256: 24fbac5f0442635bc1f657b462ade1ba9df427e461071e2ffc1a753bb2cfbcae
font_02_sfnt_off000110c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.