Malicious PDF — malware analysis report

Static analysis result for SHA-256 6679eb002777eda8…

MALICIOUS

PDF

59.1 KB Created: 2020-11-14 16:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cf0c68621e93f96579939db46653748e SHA-1: 983c57123a75026e6c49dfacd4dd360d936bc955 SHA-256: 6679eb002777eda875a35a735d193f29f536b0e0e9950cbd68434332cd515a43
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 0.9996

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://trafffi.ru/123?utm_term=benore+logistics+erie+michigan PDF link annotation
    • https://vukumurumijolot.weebly.com/uploads/1/3/4/4/134433046/vevejedavet.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/272409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387813/normal_5f9cc038b5a23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_5f9259e6d53c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5f8c94e29338a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414166/normal_5f95d5ac19540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_5f8ac37cae7e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_5f9511a43246c.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/9ca4b2da-b425-42c8-8142-fff020889214/75235223020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a57ccde9-2eda-44a2-9755-ca7b512a2dbc/juwit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c0d1f9-b908-4709-b03f-68edf32da4d2/group_6_elements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/114eb9c0-0451-4147-909d-0ae1e6750f80/segment_addition_postulate_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e77ac5c7-29bc-4fda-87c2-2c59e3b12803/bawiximapobewed.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/hdfc_life_new_immediate_annuity_plan_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b292138-1fdd-4d3b-b34c-100b13552cbc/dekisizokogi.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_off0000acf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACF6 5264 bytes
SHA-256: c3cd64340f2ea00ed53076227a5b8c189bb4a3feb24c8de88c66e569a137dd00
font_01_sfnt_off0000beb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB6 9652 bytes
SHA-256: 8b16d0169f8ea4ab928d556e791f1386c5970fb84e1207064807b0ad27176490

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