Malicious PDF — malware analysis report

Static analysis result for SHA-256 876a627cb0eec4fb…

MALICIOUS

PDF

79.3 KB Created: 2021-03-13 21:57:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90402a72fdde813d2f5cb4989d9fd2de SHA-1: bee09edc577bac6995d51c01d1b845813cea6b51 SHA-256: 876a627cb0eec4fb7598e4a5ba5235823d7b7464647e187821f65743c920a571
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1555.003 Credentials from Password Stores

This PDF document exhibits characteristics of an advance-fee scam, using a 'fake DNA test results letter' lure to entice users. It contains a large number of external links, including a suspicious URL to zajinet.ru, suggesting an attempt to direct users to malicious websites. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a phishing or scam document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://zajinet.ru/wix?keyword=fake+dna+test+results+letter+free
    • https://cdn.sqhk.co/lojegalivo/FLTiesp/37499066789.pdf
    • https://cdn.sqhk.co/madumubo/hiijmjh/rise_of_skywalker_general_pryde_death.pdf
    • http://kepidurenomabo.22web.org/farewell_to_manzanar_movie_watch.pdf
    • https://cdn.sqhk.co/soxuvezosapa/aOOfgfy/mopagera.pdf
    • https://cdn.sqhk.co/konajera/icjcFgg/ghungroo_song_baar_instrumental_ringtone_download.pdf
    • https://cdn.sqhk.co/vabalogu/egijgje/45615722955.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xurixado/89566830943.pdf
    • https://s3.amazonaws.com/lusegokaves/jagugusurog.pdf
    • https://s3.amazonaws.com/purawuma/jiochat_hd_video_call_apps.pdf
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_3b00591d5f804272be167cb717f8455d.pdf?index=true
    • http://ziwebizivag.epizy.com/baku_azerbaijan_tourist_guide.pdf
    • https://s3.amazonaws.com/wopari/chakram_movie_naa_songs_free.pdf
    • https://s3.amazonaws.com/pewebopufupe/57082742875.pdf
    • https://s3.amazonaws.com/lazesej/gevamujagesemekigodove.pdf
    • https://s3.amazonaws.com/tomamujuf/44088241274.pdf
    • https://s3.amazonaws.com/wibedubosateg/bowling_shoes_buyers_guide.pdf
    • https://s3.amazonaws.com/tugabijenovili/22724562826.pdf
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_881e176d4eb7484aa63f35e9a6904309.pdf?index=true
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_bc9f96fbf0e0421eaa52cc568df15296.pdf?index=true
    • http://texazufuvo.rf.gd/gofagawoloragulaserilugeg.pdf
    • https://a581e706-3bf6-41fb-8978-ad4d4077590d.filesusr.com/ugd/afbe6b_e1812e7b2105444196aff966eb3d3d7e.pdf?index=true
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_023b7880848b49ec86c2338340e1d294.pdf?index=true
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_e14e892d1a7a46fda119ce86a665dce4.pdf?index=true
    • https://s3.amazonaws.com/satedafadusizo/dormins_rage_trophy_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f843.bin
075b3a3a44276144d6b2e3f5a88cd76ffa5d04940d12a77449c47e5a2f2f4329		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF843 4920 bytes
font_01_sfnt_off00010910.bin
bdf13bb63c3a196327014e0e621e6db4e25847f04085cf0a2e1b09d7712a1f97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10910 11584 bytes

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