Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e1140502a892eb3…

MALICIOUS

PDF

94.9 KB Created: 2021-01-03 07:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 183620f73ecb41aa6174ea8b85b68cef SHA-1: c745d07ff9fd7498f5d7c346e5b625dc55513492 SHA-256: 6e1140502a892eb3e0fcc8f1b4c9ec90c519034194f5a428c71718961b9c856a
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or a method to distribute further malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/123?utm_term=brother+pe800+embroidery+machine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487897/normal_5fc168eb9055d.pdfIn PDF document text
    • https://cdn.sqhk.co/sexubozadifa/U0qtHjc/zuzigujajamokizaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427499/normal_5fb80d463f0a3.pdfIn PDF document text
    • https://dujezipiver.weebly.com/uploads/1/3/4/6/134610991/3088539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5fb4a734f2847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f93d1b78f77c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481273/normal_5fb33f25ebdbf.pdfIn PDF document text
    • https://cdn.sqhk.co/lojeliju/fkjfLie/cnc_lathe_machine_price_in_sri_lanka.pdfIn PDF document text
    • https://bojamaluzide.weebly.com/uploads/1/3/4/2/134265872/4231864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379471/normal_5fa746396757d.pdfIn PDF document text
    • https://bixizevabusiku.weebly.com/uploads/1/3/4/4/134403351/3ffd771fc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469365/normal_5fdb7726674c3.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/mejados/94454639929.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/dichotomous_key_worksheet_2.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/paxukenogulijo.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_off00013235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13235 5728 bytes
SHA-256: e6537cc74d2287ac331ff89de2937c9d34abe0206333dd2be44e7bb79a5be209
font_01_sfnt_off0001458b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1458B 11988 bytes
SHA-256: e3cbc988686b0322ac0e351e8d602ba7f6cfe4195d6973859031140e3a603b34

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