Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab5f61e14cec85b…

MALICIOUS

PDF

79.1 KB Created: 2021-06-07 16:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7a4592993936e45095b2806d4fb1064e SHA-1: ab5f8498561fbb297fe083e30bd13fb7089791a0 SHA-256: eab5f61e14cec85b03fe6a35116b44844f78a9e24cde2a9b546dc02cb7128212
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://irlanc.ru/pbw?utm_term=sample+house+rental+agreement+format+in+tamil+nadu PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467036/normal_60035e676b35f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475559/normal_5fca95f30b820.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383915/normal_5fcf98903e195.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418963/normal_5fc703eadd898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504641/normal_602ab473dbb55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461748/normal_603e6e7371a8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485446/normal_604f1647a0125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_605d7a5e2285e.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
    • http://jojuzoxox.pbworks.com/w/file/fetch/144772137/tifemofadomoridu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/865fb3c0-a45a-4833-9364-9941bea31626/59739811297.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/w/file/fetch/144428649/megupasudonozode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe79b6c4-3c89-402b-a9d4-a84853ce5b4a/guromibarek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82b3d224-5489-4c57-85af-114f93717dbf/puxamizedoxutela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f03d6c5e-a670-4958-b610-440344d9876f/la_divina_commedia_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f436ee-3c6d-4bc3-b801-09fc41b1835c/6286206523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2ac755-7450-46a8-ad5d-c590c3e48ad3/wagner_power_tex_sprayer_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca9561d-9efb-4e02-84d5-9f1bb0e86089/how_to_write_good_science_fiction.pdfIn PDF document text
    • http://vazesuna.pbworks.com/w/file/fetch/144616305/60757981297.pdfIn PDF document text
    • http://gugatodoka.pbworks.com/f/euro_truck_simulator_2_cheat_codes_for_pc.pdfIn PDF document text
    • http://finepade.pbworks.com/w/file/fetch/144787200/65342539075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9321b496-4a93-4a5a-8d97-99dd81ba227b/52676661953.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/w/file/fetch/144660384/rirorafabuzimizobaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/395a7a69-e80e-4a03-8fd0-471b38921640/11419509042.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89B 5440 bytes
SHA-256: 932eaad7b8a3abbd60047e85cc507ab6ef722af23ed5031f2a58b6f0f62febe0
font_01_sfnt_off0000fae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE7 10344 bytes
SHA-256: 954002d70cfe5cc3f80d7b181b3595f5c56ff4d6fc79063193863e41178389e3
font_02_sfnt_off00011e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E49 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c