Malicious PDF — malware analysis report

Static analysis result for SHA-256 b441beaf3fd64fe1…

MALICIOUS

PDF

119.0 KB Created: 2021-03-21 20:42:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d95e9bf9ff65c9c698aba5616ed902ff SHA-1: 22d0b9e84c188e5c035436eb1e4b3c227a7f8706 SHA-256: b441beaf3fd64fe17141f02f8a84a330f84bf14548f65a2479dfb9edf0684c97
186 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. 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 0.9996

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://soxebez.ru/strik?utm_term=reasoning+from+particular+to+general PDF link annotation
    • https://nokesopupikes.weebly.com/uploads/1/3/4/7/134767934/gezofanoduluwifiziwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_60337ff5e3b27.pdfIn PDF document text
    • https://bomupafevusoze.weebly.com/uploads/1/3/1/4/131407549/fewefoma_lizosekalavelut_gamigajujulene.pdfIn PDF document text
    • https://munopufunorari.weebly.com/uploads/1/3/4/8/134881547/d693c0c64c.pdfIn PDF document text
    • https://bivapere.weebly.com/uploads/1/3/4/6/134689139/jufosusuvezum.pdfIn PDF document text
    • https://bojijoda.weebly.com/uploads/1/3/5/3/135325587/8673752.pdfIn PDF document text
    • http://tepifugamokeg.medianewsonline.com/77272239773.pdfIn PDF document text
    • https://fanamixaxa.weebly.com/uploads/1/3/4/0/134017579/dolegezonewak.pdfIn PDF document text
    • https://rijojuno.weebly.com/uploads/1/3/5/3/135310883/womexuzopuko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_605062d7242e8.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/2326485.pdfIn PDF document text
    • https://gupebuxoguwev.weebly.com/uploads/1/3/4/3/134381402/sagolon.pdfIn PDF document text
    • https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/pumasegux.pdfIn PDF document text
    • https://wegidakalulat.weebly.com/uploads/1/3/5/3/135337254/ab67cc0985a80.pdfIn PDF document text
    • https://zafubunemajuz.weebly.com/uploads/1/3/5/3/135314528/1fccd0ddd55c70.pdfIn PDF document text
    • https://zitidifomeki.weebly.com/uploads/1/3/1/4/131412181/katiwabaxuf.pdfIn PDF document text
    • https://zipapujemufosir.weebly.com/uploads/1/3/5/3/135392102/30fbeabc5bcf.pdfIn PDF document text
    • https://xitarowax.weebly.com/uploads/1/3/2/6/132681505/4432894.pdfIn PDF document text
    • http://dajexori.mypressonline.com/67754886963.pdfIn PDF document text
    • https://gisipunav.weebly.com/uploads/1/3/1/6/131636927/fumujit.pdfIn PDF document text
    • https://penopamez.weebly.com/uploads/1/3/4/4/134496097/lutifiru-jabumasopu-liwes.pdfIn PDF document text
    • https://sutovuwoti.weebly.com/uploads/1/3/0/9/130968995/pixapazemunu-fixerexag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fabevax.myartsonline.com/veruxib.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_off000193a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193A9 5340 bytes
SHA-256: 7d146bdfd4b7fdf3b3bd4bccb2767e9f1e75f40f9cb0425a5dba67782040b5a4
font_01_sfnt_off0001a5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5CB 12044 bytes
SHA-256: f49da301078fafbae5a0ffeb1439ebabad1da617bc3836f5de850e7e81909d9d

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