Malicious PDF — malware analysis report

Static analysis result for SHA-256 c961941a98295e45…

MALICIOUS

PDF

74.7 KB Created: 2020-11-18 11:01:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 64462dece085ef0184b9ee56ca2d0b6c SHA-1: 79b52092686e155f8a364e7226bf080ed3bc92b9 SHA-256: c961941a98295e45448b2b6416fd0f8705234ac478b7100df5e5d496ef817d25
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The primary malicious URL, 'https://traffnew.ru/123?utm_term=children%2527s+centre+of+thunder+bay', suggests a phishing or content-luring attempt. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of it being used for malicious purposes such as distributing further malware or conducting phishing attacks.

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://traffnew.ru/123?utm_term=children%2527s+centre+of+thunder+bay PDF link annotation
    • https://kefanizitadibuz.weebly.com/uploads/1/3/4/3/134328212/rolilugevo.pdfIn PDF document text
    • https://gizalikujaxemif.weebly.com/uploads/1/3/4/6/134606641/pefub_mazidojasaxifob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f92aeecf2837.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/henghuili-files2/apqp_core_tools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd5ae3e-879d-466e-95e6-f974b22be330/fejetokuraxenuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe5bd95-ca02-4e59-ad2b-6bd4dbf0b18a/charm_city_doggie_daycare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c663c10d-d240-4d51-ac82-c5415627b607/gugipubupegar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5764f4af-27eb-49bd-afb2-3f55f5c9b2fa/97405745009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fcb1ba9-b79f-4804-b0cd-a03247eb23bb/28991629923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/344eaa7b-07c3-4f9a-a4bb-6c493c167ae9/pulp_fiction_ezekiel_2517_quote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69329f33-fd5f-467a-b602-779757aa6fa0/46369805697.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/there_for_you_lyrics_erika_costell.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32E 5292 bytes
SHA-256: c6a26cf735fb8a3d13de5a52427aa40b4353d593d1c3f04d26b94e670478ce43
font_01_sfnt_off0000d526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD526 11296 bytes
SHA-256: 502e1659e197365c16255590603002d71a4a445d191275bf1af098da461e9148
font_02_sfnt_off0000f9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E6 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf
font_03_sfnt_off00010f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F14 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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