Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda2aee116a2801c…

MALICIOUS

PDF

66.0 KB Created: 2021-01-08 14:57:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1ae0d526ab5b27643dee7eb54d594439 SHA-1: 91e4a0f50b984820da4aba8fb494bc3efc03eae3 SHA-256: fda2aee116a2801c84df35c96c342cedbb0b90ed48233b9ac308b7f585fa4583
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, indicating a link farm designed to redirect users. The presence of a "utm_term=darksiders+chaos+form+button" parameter suggests a lure related to the Darksiders game, likely to entice clicks. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing and potential malware distribution intent.

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://trafffe.ru/aws?utm_term=darksiders+chaos+form+button PDF link annotation
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/denowagigexam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449781/normal_5fb0350ab3be5.pdfIn PDF document text
    • https://fukobararusi.weebly.com/uploads/1/3/4/4/134404541/rebubanejajeroj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375886/normal_5fc3f0178ccc5.pdfIn PDF document text
    • https://fivugolukebil.weebly.com/uploads/1/3/4/9/134902908/suzizuxurizonef_relit_makevatat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477921/normal_5fef3b0a5aab5.pdfIn PDF document text
    • https://jedurabononip.weebly.com/uploads/1/3/1/4/131453193/1d5261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489730/normal_5fb2b44bc34ae.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/jc1h7hd/bewumilo.pdfIn PDF document text
    • https://wenezobu.weebly.com/uploads/1/3/4/6/134625155/gifejisubemipuxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_5fda64e76d171.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/zebokesimovufa.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/74bd7e45-68fc-43bc-a64d-b03a1fca7ad8/21054822626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd358b0-fee1-425a-a9c2-5700e01ac933/1880720803.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35B 5432 bytes
SHA-256: e2616de20ba050eebb4be572ab2aee364941e2ecc709ae5f11bbb2d839c826c8
font_01_sfnt_off0000d5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B3 10796 bytes
SHA-256: 3229cfc230b58f75e02e3fd0c2d9e97b2c746d29f867d8b10e0250e4fbd1bacf

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