Malicious PDF — malware analysis report

Static analysis result for SHA-256 c150ef6332f3ab43…

MALICIOUS

PDF

71.2 KB Created: 2020-11-20 18:57:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ae6faa9823981f9a8da41f2dcdda4dfb SHA-1: 125f65520d97807b9450fdd1695b63582967a3df SHA-256: c150ef6332f3ab43fb69256a0b6ea56150bc478b1efdd53e2367d1f5648754a8
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/123?utm_term=pci+dss+compliance+checklist+2018 PDF link annotation
    • https://latopilufazi.weebly.com/uploads/1/3/4/0/134017217/sekop_puxik_sebegitusetama_fomepi.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/xujewonagamaxu.pdfIn PDF document text
    • https://jowoxivodatut.weebly.com/uploads/1/3/4/8/134851862/xikewopiduzo-fanixajade-mileduvagipowar-meguwowopad.pdfIn PDF document text
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/mifiloreketovorelox.pdfIn PDF document text
    • https://relogeseji.weebly.com/uploads/1/3/0/7/130739887/bc879363a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/98785263582.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/grosse_pointe_blank_soundtrack_cd.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/dizojubonegogolipokenaf.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/69391070231.pdfIn PDF document text
    • https://s3.amazonaws.com/tekujel/53218159249.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/47280478818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6438af2-a96a-4e3d-91c5-5c1c65d9064d/gafofijexonekopatune.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/linililarejawonulu.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/navy_eval_input_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/76015118789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e19b5a-b4ae-4cde-8112-aba0b8e132f4/dafusufes.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_off0000d883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD883 5800 bytes
SHA-256: 2d8b7e9ac3522ac1b8474d7b59fb7fd89f59b0eebb21fdf11f92ddfb8fe2a72e
font_01_sfnt_off0000ec1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1C 10532 bytes
SHA-256: 95c2188b3c3bda04c8e5bd3b412ea5896a8a1b9a69b9cdd5fdb7d7d78a5c930e

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