Malicious PDF — malware analysis report

Static analysis result for SHA-256 856d261c5bcb2bcb…

MALICIOUS

PDF

101.1 KB Created: 2021-03-02 21:08:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a8c6436bcf24b763061f606c5307faa7 SHA-1: 95ece28f88ad87501093f6f977e3a8d075c948ae SHA-256: 856d261c5bcb2bcb69180e388731d95972e4b5a04676eec1c4668497da6d0a35
96 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, indicating a phishing or trojan payload. It contains an embedded URI pointing to a URL that appears to be a lure, disguised with search terms. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://xajibur.ru/123?utm_term=asp+net+c%2523+interview+questions+for+2+years+experience PDF link annotation
    • https://cdn.sqhk.co/bijozugetav/buichgh/50956063369.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/etgdhgh/nevikejufalegowazoreker.pdfIn PDF document text
    • http://pavawafupef.66ghz.com/guardian_vs_petsafe_wireless_fence_receiver_collar.pdfIn PDF document text
    • https://cdn.sqhk.co/ramawuvade/bgdjojj/pvpets_tank_battle_royale.pdfIn PDF document text
    • http://jukekelexoseda.22web.org/darkest_dungeon_warrens_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/idjbU4J/vidigenojejebugose.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koxikid.epizy.com/john_deere_214_transmission_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/bafipilivijib.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/iss_proxy_voting_guidelines_2018_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/76493370179.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/fuwogukagubofuse.pdfIn PDF document text
    • http://rizaxofu.rf.gd/75254237144.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/baazigar_songs_bestwap_in.pdfIn PDF document text
    • http://boxulinizisa.epizy.com/36078585758.pdfIn PDF document text
    • http://zekumom.epizy.com/62643454570.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/53449227291.pdfIn PDF document text
    • http://vedisupekak.epizy.com/what_is_soap_web_service.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/92844880193.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/guided_by_voices_propeller_discogs.pdfIn PDF document text
    • http://vevojadiren.epizy.com/13613570921.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_off00014e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E2C 4576 bytes
SHA-256: b17575ea2abac97613ec8e4204295644bebf023679b585d994b9229fc7a82795
font_01_sfnt_off00015ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DDC 12580 bytes
SHA-256: 4298794174b8734ced6bb9861ffc975d972ea843f82afaad14f5c6423839cbb2

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