Malicious PDF — malware analysis report

Static analysis result for SHA-256 94aab47904168dfd…

MALICIOUS

PDF

67.3 KB Created: 2020-11-25 08:15:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 08587594752834ca43e53c7b33572e6f SHA-1: 2700e0e11bc8a1db4fcfa98a380712e0af272582 SHA-256: 94aab47904168dfd802e4997fa11a0f0a1e910aacd6906fcc2a06b8ff23d824f
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of external URIs and a link farm heuristic strongly supports a phishing or malware distribution attack pattern.

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://traffset.ru/123?utm_term=celestine+prophecy+nine+spiritual+insights PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388598/normal_5fad141006b5f.pdfIn PDF document text
    • https://pivewunakunajuv.weebly.com/uploads/1/3/4/7/134770464/gatonoladenuda.pdfIn PDF document text
    • https://kusanogiwaxug.weebly.com/uploads/1/3/0/8/130873987/6077352.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/8809179.pdfIn PDF document text
    • https://lajezufil.weebly.com/uploads/1/3/4/6/134636359/wujogiga.pdfIn PDF document text
    • https://purajibimevu.weebly.com/uploads/1/3/4/6/134652176/kanelupokefarufozi.pdfIn PDF document text
    • https://fofexajadovobu.weebly.com/uploads/1/3/4/7/134711713/zewavubanekeb.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/c30e1c16-1fc9-4940-8fd4-6d40f85e7d9f/logitech_x_540_cables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a9296ad-07d8-449d-8f52-dcb1d5aabdad/lojigivatu.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/litafomof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6440ae1c-3065-4a29-a5c0-a5f6c11d2d3c/86269112612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60673588-260f-4d20-9d1c-9011c66dd29e/wolfgang_puck_mini_rice_cooker_mac_a.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/40144420117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5249327e-e95c-435e-8d5f-48f4aadd7edf/nba_2k15_ps_vita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1d9c53-347b-44ac-ba91-e05e785a59fe/40458630934.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_off0000c7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E5 5204 bytes
SHA-256: 9ff93a666addbd4e306a31f3e7250f266cb33065833a629dd03c50002c2df120
font_01_sfnt_off0000d99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99A 12176 bytes
SHA-256: a87974ede354330cc2a9fd699bdfacf27c114dc186e52537afe01ac76ce7086e

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