Malicious PDF — malware analysis report

Static analysis result for SHA-256 444d039443589669…

MALICIOUS

PDF

73.0 KB Created: 2021-04-03 14:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04b85ba396c9a185701556ec2291bfe3 SHA-1: 65488a9dd39b7ae0a3a49e2823b1ed864959a884 SHA-256: 444d0394435896697edae30411f622fcf60026aeff2976e0e568b468f39b5b02
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and are flagged as a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common social engineering tactic to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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 http://hookup753.fun/mountain_bike_jump_trails_near_mebopvy.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445739/normal_6067cb9827dc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367925/normal_5fef387da0a9e.pdfIn PDF document text
    • http://nagonakog.22web.org/57257006105.pdfIn PDF document text
    • http://sexefowox.22web.org/gavizedemu.pdfIn PDF document text
    • http://4gusevshop.space/aisi_1020_standardmoo0o.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/sakofox6enlc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470981/normal_6014ffaddb0ec.pdfIn PDF document text
    • http://vawubarisef.22web.org/6939425930.pdfIn PDF document text
    • http://golden-bridge.pro/illustrator_save_as_reduce_file_sizeux3a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469358/normal_606524d155e91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/0IJhScypsXo/wb?keyword=how%20much%20do%20street%20cleaners%20get%20paidPDF link annotation
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_491cb0f1a8804b9eb3c2ea2c5c2deb40.pdf?index=trueIn PDF document text
    • http://wetosunonatag.epizy.com/tales_of_zestiria_dlc_trophy_guide.pdfIn PDF document text
    • https://fae5df41-d68b-4d62-9961-cd33801cec7e.filesusr.com/ugd/f52c73_97179e5cb9814e78a1ee79b0a154fb5b.pdf?index=trueIn PDF document text
    • http://nupopagiwagivu.epizy.com/pudeweliwap.pdfIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_2a85c58d316b48ef9f0a93d2be81f435.pdf?index=trueIn PDF document text
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_564b165cde204e6da2ded8c99649b4b2.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF95 5540 bytes
SHA-256: dbe650123838581b6de6a62c84c4f8b8ce617882b74019a6c7a7eba979185b9a
font_01_sfnt_off0000f255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF255 10672 bytes
SHA-256: 2419025ad539efca71a315e68b871c576c3427183e3a93b1e85a4ad897daa282

Open this report in the interactive analyzer, or submit your own file for analysis.