Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1eec1ceada6ca3a…

MALICIOUS

PDF

82.1 KB Created: 2021-03-10 21:36:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21cf358a73066c10ee1b1bfbdfe28c5e SHA-1: d260c7ea59a441e62d1b2189903efa39f66e8417 SHA-256: a1eec1ceada6ca3ab5ac5cbe413c5e3aaca49749195d1b475265f31e002887c1
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, including one to `lozipotod.ru`, suggesting a link farm or redirection to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a PDF search term, aiming to trick users into visiting the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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://lozipotod.ru/award?keyword=os+lusiadas+o+gigante+adamastor+pdf
    • https://cdn.sqhk.co/sumefixes/jjje3ge/sosaderarenuvoviruw.pdf
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/1294607.pdf
    • http://natikolom.site/1_pic_8_words_answers6lbqz.pdf
    • https://cdn.sqhk.co/xotosobupis/jcAhfhe/gtr_traffic_rivals.pdf
    • https://cdn.sqhk.co/tamaladafa/hcKghhb/powowizimuxos.pdf
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/28f4a.pdf
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/xaxuxovonujat.pdf
    • http://verifiedbadge-lnstagram.com/28865005528k2qpr.pdf
    • https://cdn.sqhk.co/butemobe/jagjjeo/olympics_2016_medals_badminton.pdf
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/wenadoka-sezepesorokup-xerufixegag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/faluzotixupi/malenaxuwuratiraxexozop.pdf
    • https://uploads.strikinglycdn.com/files/0cf3a8a4-8b44-4b68-b1ac-0ca14f01e9c0/78104078251.pdf
    • https://uploads.strikinglycdn.com/files/d4a9d707-2ac4-4a29-957c-4d7edc31e173/pirilatadakalu.pdf
    • https://s3.amazonaws.com/gurowozenupifi/ketesisejosasat.pdf
    • https://99104389-a8e8-46b3-a188-4b62913af25a.filesusr.com/ugd/8d46c2_26035ab4e2cc4cdabe0fe0daf9173b2a.pdf?index=true
    • https://73856814-13bb-4d44-aeaf-752cce6ba6bd.filesusr.com/ugd/a0d21a_63f082a4c8834486846aebb60839a6a9.pdf?index=true
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_53cfbfa2e02147d99290d2f30e447c7f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a71b94bc-d2ed-495b-90fa-7cc1a350a41f/the_moral_of_the_story_an_introduction_to_ethics.pdf
    • https://s3.amazonaws.com/kotodur/rv_toilet_seal_lube.pdf
    • https://s3.amazonaws.com/rebesudanolo/sharp_aquos_tv_software.pdf
    • https://3c45aaf8-24f3-4cde-9773-cf44a0a970d3.filesusr.com/ugd/ae7d54_c00542eb35d844b1b95e02fd7c6c7895.pdf?index=true
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_e51f39ffaa40410ca23068352352ef47.pdf?index=true
    • 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_off0000ff55.bin
fd0acafc66a8694459edfea9ea64f1fa6a97f83dadabf4f86f2834218d0adaa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 5388 bytes
font_01_sfnt_off00011191.bin
ce8eee62d2740d633d796b5c9ab558a4f25fc5f84444d229888b929434910c5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 13136 bytes

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