Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f0e01a289b22b6…

MALICIOUS

PDF

69.3 KB Created: 2021-02-24 17:34:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5135278e3a01c1bb176f79fd68483f15 SHA-1: 3871d813305791c71d7262a11034aae52170dfb2 SHA-256: e9f0e01a289b22b61d29230b938f6e35ce55aa007bdfa5420fd7a91589f22d1b
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to technical or financial information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=how+to+calculate+natural+gas+flow+through+an+orifice PDF link annotation
    • https://cdn.sqhk.co/parapirer/giWohbJ/44361537818.pdfIn PDF document text
    • http://shishkin-seed.xyz/zogevuxawasimaxilusi43sj.pdfIn PDF document text
    • http://test123test.xyz/49131862144oe895.pdfIn PDF document text
    • http://sq11mini.com/catholic_reformation_history_definitionzvozl.pdfIn PDF document text
    • https://cdn.sqhk.co/togodawexu/ha98jdX/gegininiwavunibesika.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/7jd5hdu/td_auto_finance_late_payment_policy.pdfIn PDF document text
    • http://emmetrix.net/66890482764dfca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422877/normal_60192e60f0da6.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/ilgeegf/915133271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_602a0fed164c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujapoguxesak.myartsonline.com/what_types_of_intermolecular_forces_are_present_in_ammonia.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/blank_political_map_of_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/teach_like_a_champion_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A6 5196 bytes
SHA-256: b9aa8e42b54d7ba13ec91ca7130b037451569206e99532836f5320bbc2dfdf31
font_01_sfnt_off0000e45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45D 10576 bytes
SHA-256: 2d1516a1d45496de1e58a6d17bd66b65642f6ab759520a6881104ad817c0743d

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