Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5cecd0e5286d206…

MALICIOUS

PDF

95.7 KB Created: 2021-06-04 14:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7080d6eedb61aa0bc929633d08e0b9f8 SHA-1: 43df488a2577fa0f9b00d3fb4548c15acd7a2a3a SHA-256: f5cecd0e5286d2069a76069ab8d3203e9be42e2a208c2dec0c8810924c24a3ce
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to 'Dominos near me opening hours', likely to trick users into clicking the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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 https://queure.ru/pbw?utm_term=dominos+near+me+opening+hours PDF link annotation
    • https://gaturavokig.weebly.com/uploads/1/3/4/3/134317265/volemepulo.pdfIn PDF document text
    • https://tokokurud.weebly.com/uploads/1/3/4/7/134744431/c97f59096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_60466721f07b2.pdfIn PDF document text
    • https://nifisutabunus.weebly.com/uploads/1/3/4/6/134634245/xifosubup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_6058da6939ead.pdfIn PDF document text
    • https://jajipovel.weebly.com/uploads/1/3/4/5/134527293/4d2dbd9afb2fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462036/normal_600b9a9a88d78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_602e37b697d83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4531523/normal_5feda0845b518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495059/normal_606b09ae3b457.pdfIn PDF document text
    • https://lefafikof.weebly.com/uploads/1/3/0/9/130969708/16007.pdfIn PDF document text
    • https://tifelekaguli.weebly.com/uploads/1/3/4/7/134744440/tenusibi-juwopipuzi.pdfIn PDF document text
    • https://bovoladimuva.weebly.com/uploads/1/3/0/9/130970023/defewax.pdfIn PDF document text
    • https://sobokiza.weebly.com/uploads/1/3/4/3/134363786/wolawixixibowi.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://uploads.strikinglycdn.com/files/cc251e7a-114e-42d1-91b0-a6b848890bb7/fokezasupegugobakuzix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d190eda4-0da0-4535-8f31-86963ddc6944/vozeduzativen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/366fa57d-d456-4755-8c6a-cd0811a0a2bb/how_to_hook_up_ilive_5.1_home_theater_system_to_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d5bc1b-6568-49ce-8c54-4ecbe222cf61/rojilap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d69299e-bfac-4844-bca8-2d44021cb40b/how_to_reset_a_c1100t_modem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e96535-dd6c-4851-86f5-131773aca541/79725397504.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_off00010dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAE 5000 bytes
SHA-256: 26f938a24cb54c81908f43ead73e537391f55532c01e5edf97c5e9acdf68d6d1
font_01_sfnt_off00011e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E79 12672 bytes
SHA-256: 76ca3ef06325674c6eeb74f271877444aaa02e600f5ba7e9be4bfbfbbd72c032
font_02_sfnt_off000149ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149CE 16764 bytes
SHA-256: 62312e632dc754a14d565273fc0d1781b989edbec6f26102301956d52c15ce88
font_03_sfnt_off00016154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16154 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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