Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2afa54a61879642…

MALICIOUS

PDF

82.6 KB Created: 2021-03-28 15:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 64c21bca8e08795c096372cd0cc6aa58 SHA-1: c34cf1255b10260a6b992c213a8090fda976c955 SHA-256: f2afa54a6187964243565c45759989063b049ff9bfdaab5e609c5aa3a8fe81d3
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure using an SEO redirector, specifically pointing to a URL that promises a crafting guide. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a second-stage payload. While no scripts were directly extracted, the PDF structure and URL suggest a phishing attack aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/wix?keyword=the+escapists+crafting+guide+xbox+one PDF link annotation
    • http://firavowinoza.iblogger.org/vevadezem.pdfIn PDF document text
    • http://vwwv-avito.online/80573105422wc4ds.pdfIn PDF document text
    • http://hellochildren.online/crinkleroot_s_guide_to_animal_habitats8avh3.pdfIn PDF document text
    • http://tohld.in/angulos_en_posicion_normaln2cen.pdfIn PDF document text
    • http://lady-bug.club/bubble_shooter_3d_apkjyj33.pdfIn PDF document text
    • http://dvestideyli.xyz/schlage_camelot_entry_door_handle6dbzo.pdfIn PDF document text
    • http://detonic-hypertonie.website/4920325345y2xer.pdfIn PDF document text
    • http://plsale.pro/fozozuvutukukukunimotazoxqvxpw.pdfIn PDF document text
    • https://visegiwizokin.weebly.com/uploads/1/3/4/7/134721612/rexuwelulowi_juwez_dinava.pdfIn PDF document text
    • http://eurofamily.pro/202088941419k879.pdfIn PDF document text
    • https://tiselewo.weebly.com/uploads/1/3/1/6/131606631/29e51134f7f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xakusineba/19169204425.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/13844549168.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/likofoxirusufixunamaz.pdfIn PDF document text
    • http://valamujunitun.epizy.com/37509705318.pdfIn PDF document text
    • http://tiwadelir.rf.gd/checkers_board_game.pdfIn PDF document text
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_5b479b942851449b8f84930ae50a3bba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/melian_dialogue_explained.pdfIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_a897bac183384777a88669d8b410cca3.pdf?index=trueIn PDF document text
    • https://e7ba4f66-d023-404d-a355-a5b98970f127.filesusr.com/ugd/cac9e4_ee32b967419448dab439d47ccb0384c8.pdf?index=trueIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_86f3ea6222324f47a934fad89c9112ba.pdf?index=trueIn PDF document text
    • https://148d48ef-a78d-4e34-a4d2-755cfbac042a.filesusr.com/ugd/ccca9b_a246208ce26349e3b33106fa343fc159.pdf?index=trueIn PDF document text
    • http://jewexaruwibel.rf.gd/380936744.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_off000103d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D3 5540 bytes
SHA-256: 7eda42f6aabc9400fe388e13a86e38537371f65e8280cc9c3b5b677c4eb9c27d
font_01_sfnt_off000116a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A4 11280 bytes
SHA-256: e58d3324715b7805345e8eab3ac600f993cf5de29ddaf144ebaadcf81c2e908e

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