Malicious PDF — malware analysis report

Static analysis result for SHA-256 314787d95585f7f6…

MALICIOUS

PDF

85.0 KB Created: 2021-03-01 18:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 47ac26f1051e3df34187bde7c0b6bae8 SHA-1: 37ee995ff05f41ce926a10be3c480992dd958577 SHA-256: 314787d95585f7f6abbe48daa861405d9351ffdd04071d5bc940715f1f7b26c8
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure suggests it is designed to lead users to potentially harmful external sites, likely as part of a phishing or scam campaign.

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
  • 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://yafferge.ru/strik?utm_term=98+honda+accord+haynes+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5fd61008c8b18.pdfIn PDF document text
    • https://roturusuwanowus.weebly.com/uploads/1/3/4/3/134363773/5734603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446761/normal_60119b8390326.pdfIn PDF document text
    • http://good-production18.site/plague_inc_parasite_mega_brutal_androide1a20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_5fe8f18377953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383806/normal_600ee1633ac3d.pdfIn PDF document text
    • http://gtomishebs.xyz/lorinafowoxixenekejbm96z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455916/normal_60131811ef5dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413590/normal_600e32c20fa09.pdfIn PDF document text
    • http://about-igsupport.com/49113863703rqa6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465908/normal_5ffe19e43371f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450039/normal_6038800471d00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_600f16fef24d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_602c5db3d785e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459805/normal_603a5c2d6cf2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486778/normal_5fd19d978bdc4.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/xoxaneral/67989267273.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_off0001017d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017D 5288 bytes
SHA-256: 721643297cad900f43811fed2428574322f6ca2eba9c2b5a3068d9edfe9ca394
font_01_sfnt_off00011336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11336 10888 bytes
SHA-256: 0e15b83df07a3153f1c09c3682d806c10de696367279279f21e83ab167857301
font_02_sfnt_off0001386b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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