Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f4e3d3ef4c439fe…

MALICIOUS

PDF

67.4 KB Created: 2020-12-29 20:19:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8c59b7452a899be8c29e10cedd10330c SHA-1: ef32450efc3557e2da87512491d4ce2b87bf1b65 SHA-256: 4f4e3d3ef4c439fe4163c43a7ed4e5f79a46832b1eff0d2166ff5bb78708bb84
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, forming a link farm, with one prominent URL pointing to traffking.ru. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam context, although the document body itself is heavily obfuscated and does not provide clear textual lures. The primary attack pattern appears to be the creation of a link farm to distribute or host malicious content.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wb?keyword=mechanics%20bank%20oxford%20ms PDF link annotation
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/7013780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425727/normal_5fab1165dcd55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384470/normal_5f9c759db0ae4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372682/normal_5f8a2c8bb8141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403805/normal_5f9519349be47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457008/normal_5fb7930b269c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391602/normal_5fa9b74445fd0.pdfIn PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/346950b6.pdfIn PDF document text
    • https://pikiromubivi.weebly.com/uploads/1/3/0/7/130739210/62eb4ad99.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/felasorarabipis/garmin_drivesmart_65_with_traffic_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d188d62-3bfc-4ac5-8c6d-109f3e180db2/wimbledon_2019_tv_schedule_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c380d287-7009-4ecc-9e1e-74213ea1b845/hersheys_best_brownies.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/cyclohexane_chair_conformation.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 6

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_off0000c7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B0 5504 bytes
SHA-256: 67b5c29a9018d3fe3ff16ce7a0d7552ff5d221e4b03e6744f25c4350d32c89d6
font_01_sfnt_off0000da50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA50 11264 bytes
SHA-256: bbc39ba46e631d1d8a67bb0441c3e7a69967cc42ddf975da11597886a92699ed

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