Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab58d23bbf4a03f3…

MALICIOUS

PDF

89.1 KB Created: 2021-03-12 04:43:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6220475db7921a9b76730d42e7c37681 SHA-1: ea62fa3e607c731593e9ce1e4bb866901d972aaf SHA-256: ab58d23bbf4a03f377c40d9daa8281469e4b3bf56637018ab19ec28505a2754a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it is designed to redirect users to malicious content, likely for phishing or malware distribution.

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://golowaki.ru/123?utm_term=god+bless+the+child+guitar+sheet+music
    • http://majelogajizivo.iblogger.org/ll_bean_flannel_sheets_twin.pdf
    • https://zuxevuzefadum.weebly.com/uploads/1/3/0/7/130775429/meribetidi_jezefopikedon.pdf
    • https://jasezanita.weebly.com/uploads/1/3/1/6/131637239/3206537.pdf
    • https://lorufolirosob.weebly.com/uploads/1/3/4/5/134584190/150008cbb4a70.pdf
    • http://gemosugobez.22web.org/clarion_radio_cz302_bluetooth_pairing.pdf
    • https://vexebosarewasu.weebly.com/uploads/1/3/4/6/134699383/nuveguv.pdf
    • https://sixonawujow.weebly.com/uploads/1/3/4/3/134369174/4727425.pdf
    • https://rofozewoguse.weebly.com/uploads/1/3/1/3/131384025/8784382.pdf
    • https://cdn.sqhk.co/lebapivi/Vjdwhc3/crossing_the_delaware_battle_of_trenton.pdf
    • https://cdn.sqhk.co/kabevapixox/i8hjVnl/kotimowekabukimejilugan.pdf
    • https://cdn.sqhk.co/wifuponi/ifq7Gic/getuna.pdf
    • https://tewedarutomos.weebly.com/uploads/1/3/2/3/132302993/xofum-vanelan.pdf
    • https://cdn.sqhk.co/tojebaru/jeG9ifs/download_best_sniper_shooting_hunter_3d.pdf
    • https://rinuvigilositu.weebly.com/uploads/1/3/4/4/134463450/romimakajaka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sesugemedolaf.rf.gd/agora_2009_full_movie.pdf
    • https://uploads.strikinglycdn.com/files/a0d7d5c0-e10d-451e-8629-ca705a6c6467/tibisatapoposadewik.pdf
    • https://uploads.strikinglycdn.com/files/39e32521-4acb-4348-b844-c6705d744918/biblia_de_jerusalen_app_gratis.pdf
    • https://uploads.strikinglycdn.com/files/55d5dd57-6b1f-415b-adbd-aea2f65fc1f2/what_is_the_book_land_of_stories_about.pdf
    • https://uploads.strikinglycdn.com/files/02d4e5f9-5d34-4a8e-96c0-c961306684b9/fikoj.pdf
    • http://burerekel.rf.gd/combining_like_terms_worksheet_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/e876af14-07c0-4735-8313-63b5fd807899/39361610683.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108ea.bin
b80581471a78cac29e35776992eec7e1dbd5c62c3144d3c767681b0b254ba825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108EA 5524 bytes
font_01_sfnt_off00011b8a.bin
effc366d5b3655c1852b277977fa15dbc21a633cb3ad7cde099a6f6050a9e227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8A 11324 bytes
font_02_sfnt_off000141ee.bin
b59afbb2f683942213df284fd86cd9422ada0c5f1ffac7698db8c94a40390bc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141EE 16100 bytes

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