Malicious PDF — malware analysis report

Static analysis result for SHA-256 b359ac967dddcfd9…

MALICIOUS

PDF

77.2 KB Created: 2020-12-28 17:07:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 20c78e34e1bece3a6a331185d6944461 SHA-1: 57c278ae1a4d1ae3cf096524bfe973dff2aa5476 SHA-256: b359ac967dddcfd988a7508627258d9bac6f5c782a95577c8918eaa54c77357a
244 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to known malicious redirectors or disposable hosting services, indicating a phishing or scam attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely intended to lead the user to 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?utm_term=jack+gantos+neighborhood+map+pdf In PDF document text
    • https://tatabakag.weebly.com/uploads/1/3/4/8/134885094/dodavupebawoga.pdfIn PDF document text
    • https://robonodibogiva.weebly.com/uploads/1/3/4/6/134630072/bef36b880ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476152/normal_5fada394c09d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419654/normal_5fa9bd7f2a674.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/7143096.pdfIn PDF document text
    • https://fiwadevu.weebly.com/uploads/1/3/4/5/134592392/bafupovozix_wejuboralipaz_bijezudakes_mesegax.pdfIn PDF document text
    • https://lifovidas.weebly.com/uploads/1/3/1/8/131856672/ruxedirusij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_5fe8e53e0915e.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/tobobowu/bitlife_generations_update_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/95456647704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043d848b-0264-46f8-8168-df8db780b9f5/.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BF 5732 bytes
SHA-256: fc8c8ae6652c9fb1e0982fda61055b78034be673d8159cfd981414826910b202
font_01_sfnt_off0000e60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60F 10508 bytes
SHA-256: 0411300402d01c89ad81c46910c06924a5b931f511e487534a187bc21ce5e39c
font_02_sfnt_off00010a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A31 18656 bytes
SHA-256: 48de24a378eb1e0f497c2cbb6f94b8b7482147e5a7003aa87b2ff7da89e6f30c

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