Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f09c401f8379d0f…

MALICIOUS

PDF

75.9 KB Created: 2020-11-19 09:52:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7739b72c3071b4157db2586ab251bf9a SHA-1: bcc7f63d833307215bec2b586d4ffd70f55768f4 SHA-256: 2f09c401f8379d0f2979254ad334b27296abb62c07dda83f0be9987646e0d463
156 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 0.9999

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
  • 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.
  • 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/strik?utm_term=reported+speech+introductory+verbs+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413587/normal_5fb526b4ef12b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412908/normal_5fad5ffd14de7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_5f9cc95fe1f1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481520/normal_5fb2a863597f1.pdfIn PDF document text
    • https://xabopefasuliwik.weebly.com/uploads/1/3/4/4/134445681/zosutoga.pdfIn PDF document text
    • https://voziguwotameba.weebly.com/uploads/1/3/4/3/134345279/237228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380219/normal_5f919b1cb2ba3.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/1da9d8c5-4807-47a6-a65c-a2111c1ce33f/south_amboy_nj_weather.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f4c0229-3557-440a-95c3-86a893502190/darewejewovoxizibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d554de1-099e-46a4-a8df-bd1bfd9dbaef/antha_arabic_kadaloram_song_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/22389245127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5679e848-e692-4b62-9179-10c8ece73ea8/vujitubada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c99c318-5553-4e73-801e-16afaa731025/1093738001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c57d58a-4a4a-4236-9245-4cac29712442/56373233492.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/you_fit_into_me_analysis_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1741e475-73d9-426f-9b58-e6fd402e3daf/12896962108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afb52b3e-7352-4984-a034-6aa3654bda49/7197777576.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE153 5312 bytes
SHA-256: 4209f6d0c31bc8b000c1fcc99e891fad50a58a6e31aeb6d6aaef7d88b1b232cd
font_01_sfnt_off0000f36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36D 15052 bytes
SHA-256: bc2cebf85282b8067aecde909862dcd3696e6e2b3e47add366db97c341bca672

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