Malicious PDF — malware analysis report

Static analysis result for SHA-256 478b61b1b8466433…

MALICIOUS

PDF

71.4 KB Created: 2021-03-25 07:15:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 22dd6d165ce5a78a1b54c2be413acc8c SHA-1: 846db0fd71fdf35649f81ad0ab0442f3bdc958fb SHA-256: 478b61b1b8466433babc608d05e9a513129e6a8543d98ef438ba4cc2d8c0d87b
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://soxebez.ru/wix?keyword=zeldas+lullaby+tab PDF link annotation
    • https://lasuzolus.weebly.com/uploads/1/3/5/3/135315371/nupobugokupuser-goxafibe-nexosaxi-dejatelagefudum.pdfIn PDF document text
    • http://dewobazul.22web.org/11746708694.pdfIn PDF document text
    • https://xobojurum.weebly.com/uploads/1/3/4/5/134599739/tolazumeje.pdfIn PDF document text
    • https://nafesidupige.weebly.com/uploads/1/3/2/6/132680955/4149605.pdfIn PDF document text
    • https://garepogive.weebly.com/uploads/1/3/4/8/134871831/filezegolopopase.pdfIn PDF document text
    • https://xaxuxogupovugid.weebly.com/uploads/1/3/0/8/130874119/foranakovo-vuvanu-vupitojaxozul-wifisiv.pdfIn PDF document text
    • http://krepezh.guru/marquis_de_sades_justine_1977_ok.ruu8izg.pdfIn PDF document text
    • http://megatorg.ru/is_it_ok_to_change_for_someone_you_lovenpcaf.pdfIn PDF document text
    • http://gbo.guru/traditions_100_board_games_box63swn.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/331600068797eyn4.pdfIn PDF document text
    • http://ipatovaalena.ru/6633500681pistz.pdfIn PDF document text
    • https://detaxotipag.weebly.com/uploads/1/3/4/7/134730838/lovaka_zegutaf_sigujulo_gusagozine.pdfIn PDF document text
    • http://winoorama.site/can_i_split_a_directv_signal_to_two_tvsa5jsi.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/viwebavaxusujazibedinekis.pdfIn PDF document text
    • http://parkji5x.xyz/kidekovinikijemepofpc83w.pdfIn PDF document text
    • https://rozomibevepozif.weebly.com/uploads/1/3/0/7/130775668/1b1667a988dbf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zojabavikejowi.rf.gd/89793707693.pdfIn PDF document text
    • http://bunopudo.rf.gd/31195838058.pdfIn PDF document text
    • http://gezixus.myartsonline.com/98012653599.pdfIn PDF document text
    • http://rigirulame.epizy.com/jko_level_i_antiterrorism_awareness_training_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD068 4540 bytes
SHA-256: 296554fd6f45949646085352b674ed3c91582adbaf8e4137b2edab3b81fe7fd3
font_01_sfnt_off0000dfdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDD 10256 bytes
SHA-256: 5ef5c1788b5d8828389de83e963e66d840933dd2aa53f1cb75087ad49bc082bf
font_02_sfnt_off00010282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10282 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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