Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09e2e282c3f31d4…

MALICIOUS

PDF

93.3 KB Created: 2021-03-09 01:35:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: adbdd37b866cce1f8744d0b3fdf0b733 SHA-1: 1f4d73dd5cfc22903703dc8adee4e7afeaa2f467 SHA-256: e09e2e282c3f31d472571d3ef1eac3e93048d7d80ffdd300aa568c4921a06dfa
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to direct users to potentially malicious or deceptive content. The presence of embedded URLs and the overall structure strongly suggest an attempt to lure victims to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://nipisod.ru/award?keyword=functional+power+training+rusin+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368964/normal_5ff10e218aa11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454562/normal_602b2b4f06795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421624/normal_6041fc4d27fdc.pdfIn PDF document text
    • https://mavuzoxawajike.weebly.com/uploads/1/3/0/9/130969593/zozoki.pdfIn PDF document text
    • http://winoraama.space/31065146255tzbij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372373/normal_5fe10e8883d44.pdfIn PDF document text
    • https://sikalejewop.weebly.com/uploads/1/3/5/3/135341852/nojekulikizuvotosum.pdfIn PDF document text
    • http://tetekegobuj.iblogger.org/renal_diet_for_dialysis_patients.pdfIn PDF document text
    • https://dirukarizudabi.weebly.com/uploads/1/3/2/3/132303081/xolamixepi.pdfIn PDF document text
    • http://airned.ru/35298631008744rm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448733/normal_6003fd5b81e51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_602fee3a479d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367302/normal_6006394f8d95c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_602d3b3827724.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://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_567c1635e25746cdb75b4989891dc4e0.pdf?index=trueIn PDF document text
    • http://zoxutudirufusoj.epizy.com/free_video_intro_templates_without_watermark.pdfIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_552101b9df784651bb846685d9efa174.pdf?index=trueIn PDF document text
    • http://kitalanexu.epizy.com/learn_accounting_easily.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_be7bca6aae094fb485d1f982f8f8a55e.pdf?index=trueIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_68e8d33009c74507a0551f85558963c7.pdf?index=trueIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_1fbbd2b468a4491090dbaddbf3408a6b.pdf?index=trueIn PDF document text
    • http://bapexuzajo.epizy.com/193059143.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_off0001231a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231A 5252 bytes
SHA-256: 825ff975bf752ed488d7d1e701d827b6f6cc0100b2165db714344e0e8d6905ae
font_01_sfnt_off00013510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13510 10624 bytes
SHA-256: 95f5b31f66f9dcd95a004fdba3e946e69dc0438f20384f60bbfecde9d831ab7d
font_02_sfnt_off0001593c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1593C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176