Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12e0330f540736d…

MALICIOUS

PDF

75.6 KB Created: 2021-03-01 08:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4a1936957df4cd0a5e623c728d78526b SHA-1: 678278597741350c538ff95a281f58c2c3bfcd79 SHA-256: e12e0330f540736db2354a2f28517f381ce858554c02d238e90f48b926018a01
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a likely attempt to redirect users to malicious sites. The presence of external URIs and the overall structure suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/wix?keyword=michael+giles+jr PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379369/normal_60001d3bb3ec4.pdfIn PDF document text
    • http://gayerkan.com/minnesota_vikings_scores_2019qd1lv.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/gsHhbhd/90630264935.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/ydCNjj1/fajelapozelifixegu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501214/normal_5fe97435d6f64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447252/normal_5fcd87fa56af4.pdfIn PDF document text
    • http://lidedapomegila.iblogger.org/quartz_micromachining.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/ISXlid4/85602076714.pdfIn PDF document text
    • http://4gusevshop.website/zazewebrde1u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476142/normal_5ff60f178892f.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/heBW3id/63322320774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450883/normal_603be6d10107b.pdfIn PDF document text
    • http://vitezozikupu.iblogger.org/predictive_analytics_tools_for_hr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472501/normal_60048ecc72ea2.pdfIn PDF document text
    • http://zilijakal.iblogger.org/palanilu.pdfIn PDF document text
    • http://romeita.space/25266862302n5gq2.pdfIn PDF document text
    • http://momentikshop.space/alien_covenant_prologue_the_crossingyb8f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaralitotido.rf.gd/catapult_king_mod_apk_unlimited_magic.pdfIn PDF document text
    • http://turufefi.rf.gd/bosques_tropicales_en_mexico.pdfIn PDF document text
    • http://josekopiguvalup.epizy.com/how_to_set_up_a_bereavement_support_group.pdfIn PDF document text
    • http://vuzoziwulof.epizy.com/11332307840.pdfIn PDF document text
    • http://fuzimobikuxuta.epizy.com/29036897666.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_off0000ecbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBB 5144 bytes
SHA-256: a55b331904910dc3986e8def316e35723476cec6f7a4795275c62253285d4bb7
font_01_sfnt_off0000fe43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE43 10324 bytes
SHA-256: 62209517a05ade746202cb10cbda010ea4c621f7c2ff9ac7bba3513771a0d74c

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