Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee407afac03415a…

MALICIOUS

PDF

67.8 KB Created: 2020-11-19 19:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0a97c9d19d1685ddb2665d2b31785c03 SHA-1: 86468806945d07acae7a56a5ee767bf463656264 SHA-256: fee407afac03415a815bccf7642996eed34ac52e27b0de8fad3f4bef921debda
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with critical heuristics identifying it as a malicious redirector link and a PDF SEO link farm. The ML classifier and ClamAV also flagged this file as malicious. The embedded URLs likely lead to phishing or malware distribution sites, and the document's structure suggests an attempt to manipulate search engine results or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=pesawat+tempurku+lirik In PDF document text
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/selodiguriximox-vuxajobej-jiripajaxemipu-witimuvaxaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374359/normal_5f9fb35447517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473640/normal_5fa92f43e4497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473056/normal_5fabbc42135ad.pdfIn PDF document text
    • https://lezunodukulo.weebly.com/uploads/1/3/4/3/134341823/lavoguvavozuvopijumu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_5f9facd528bce.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/1376720.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/remoxi/headphones_buying_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/brownlie_public_international_law.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/cooking_guide_tbc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37bc7a68-b977-4590-b19a-4ef3dc77beee/8_ball_pool_unlimited_guideline_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/clueless_watch_online_123.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/ginafugixasovinixazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c81ead6-d8a0-4b0b-87ed-679ddbacfb16/kukesawimufasigozego.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_off0000c113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC113 4788 bytes
SHA-256: 2bba1f966c9b352655703f8d18f9450e7f9b66029f456de667a5cbcdd0168e36
font_01_sfnt_off0000d162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD162 10260 bytes
SHA-256: 6032f8a3120217a479877d40e37d42c19eb906ebc812ca71e54f7986122bb474
font_02_sfnt_off0000f485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF485 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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