Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3080bf76e5f6222…

MALICIOUS

PDF

112.3 KB Created: 2020-12-28 18:04:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b5488b24305eda0b4280c7cea6efaa41 SHA-1: 0bbaac81d2ef07657bd57cf4ebab2d0e990f4546 SHA-256: b3080bf76e5f62221a07654729307078ec84e7c5f5ddb0601a9363368d17f8b2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous external links, including one to 'traffnew.ru', suggesting a phishing or link-farming attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate the document's primary purpose is to redirect users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffnew.ru/aws?utm_term=abdominal+trauma+ppt PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418199/normal_5fbe84b0aff1a.pdfIn PDF document text
    • https://cdn.sqhk.co/nalomuxe/hjgjjdZ/55514995679.pdfIn PDF document text
    • https://defugelunek.weebly.com/uploads/1/3/4/5/134524545/8db5dcf9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389095/normal_5fa3c32952ae7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414156/normal_5f9eb9a303d94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_5fbed2af51102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f9cdd634ecc3.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/wezekupururafit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1198d52-3a9d-4954-b37f-1bca63405c8d/guilford_county_inmate_visitation.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/hanuman_cartoon_hd_images.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/speak_english_like_an_american_book.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000159a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159A2 2772 bytes
SHA-256: 2668a59963aee7949f5b1b8974e73300b790a6379d1b57d048bff1e18b434f35
font_01_sfnt_off000165b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165B1 5056 bytes
SHA-256: 31b8b8348a09823173de6b7bbae6e527f55fafde6df781d4bceb40936e6a26c5
font_02_sfnt_off000176bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176BD 11660 bytes
SHA-256: 7375225ab968be9b20dcb62498e0ccfa76338aa102670c8a4d938cbe2b3b96a7
font_03_sfnt_off00019ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EBC 16136 bytes
SHA-256: e062faff0b5f3d12ef96d17a813e209689a07cec8984531399442ab350abe39b

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