Malicious PDF — malware analysis report

Static analysis result for SHA-256 26049555fe480f7c…

MALICIOUS

PDF

65.4 KB Created: 2020-12-11 15:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4cace2aeff9bddc9034ec78758e5ba2d SHA-1: 33b2021b961a47840ba819c99b48aff3c4d1a154 SHA-256: 26049555fe480f7c0b0789c10b14271b139731e38b497d4f61ab071ec54dc353
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by both ML classification and ClamAV, with a high risk score. It contains a significant number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM' and another as a 'PDF_SEO_DISPOSABLE_LINK_FARM'. The primary malicious URL observed is 'https://traffking.ru/strik?utm_term=salton+yogurt+maker+manual+pdf', which likely serves as a redirector to a malicious site.

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://traffking.ru/strik?utm_term=salton+yogurt+maker+manual+pdf PDF link annotation
    • https://nimujebiparifil.weebly.com/uploads/1/3/4/7/134730121/9530316.pdfIn PDF document text
    • https://pajowivi.weebly.com/uploads/1/3/4/9/134904739/ronisuxenunapij-xukug-zuripakirup-mugix.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kadupe_ripovu_jozovagazemewe.pdfIn PDF document text
    • https://zifidobu.weebly.com/uploads/1/3/4/3/134371145/pokuvigotirilig.pdfIn PDF document text
    • https://kajovagej.weebly.com/uploads/1/3/4/7/134747054/panuzonosajarap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2552e351-a11e-4616-9565-32a5d879bf24/buy_minty_pickaxe_digital_code_fortnite.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/35891823496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c47e2455-8853-4cbb-bcad-d6210b8cb755/conjugaison_anglais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5d821a-1995-42bf-a02e-e2f1496b65c0/guzoniporofokebatenejunof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb8786a0-ebd0-4a0e-badd-ed1aee984718/zombie_cafe_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b95dc6-a8a6-4a49-b6a7-7e8733ad8e80/39326255964.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f3e1bf71053ccb1d777a/t/5fc9b34d9c93c058c481f5fe/1607054159292/49852100639.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D9 5452 bytes
SHA-256: 41d8839d4deb1f28a676e5ad8bd6a13d4a81b32ad479989dcef184a9c425cdf9
font_01_sfnt_off0000d55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55E 10704 bytes
SHA-256: 8580b7dcc28b9775cf8fc503492a7ac86d201eb1c5f7636df2ec6e59ad4a9f18

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