Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff852e11bb61b11f…

MALICIOUS

PDF

69.5 KB Created: 2021-03-25 06:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6330365b27f2d09315b073bd0a8af727 SHA-1: be4dddaf7853c37a3fd9929887b6459fd4c647a3 SHA-256: ff852e11bb61b11f4da5a87560323adc40e762edc7702f6f60f11cf2dfcc0eaa
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with a significant number pointing to potentially malicious domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains keywords related to a "Comcast x1 set top box manual", likely a pretext to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://botokaw.ru/wix?keyword=comcast+x1+set+top+box+manual PDF link annotation
    • http://denizan.com/7136802594ettwl.pdfIn PDF document text
    • http://tublitalia.fun/samurai_champloo_episode_12_filleruahj0.pdfIn PDF document text
    • http://6gusevshop.space/37301879133lpwgj.pdfIn PDF document text
    • http://servempieza.site/guitar_tab_notation_guidekpxcw.pdfIn PDF document text
    • https://cdn.sqhk.co/sorubajuzoxe/jbhbgdU/vowogadozuwanimaturimit.pdfIn PDF document text
    • https://cdn.sqhk.co/riraxizilob/doazjfs/smart_wifi_light_switch_3_way.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/ehizche/artisteer_joomla_template_positions.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CDWhbqq/bamogapewinifusofenarilog.pdfIn PDF document text
    • https://cdn.sqhk.co/rowagana/ididbwP/nightlife_in_prague_czech_republic_city_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/sijbrgc/revelation_song_kari_jobe_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/kuregemuwu/TgfijkF/7391178910.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_a83620b7befc47f98beb2e0abb383742.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/incomplete_dominance_pigments_worksheet_answer_key.pdfIn PDF document text
    • https://02aee961-309f-4c8b-9790-08f12c26706e.filesusr.com/ugd/8321db_03a07b97e3db496b918a53b5c9061fbe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dupula/dream_yoga_studio_mclean.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/carbon_dioxide_cycle.pdfIn PDF document text
    • https://67389751-14cc-4ed3-b660-7ef7239e4cc3.filesusr.com/ugd/bb5584_7b0a5b3d4b374768821a26695dc92b68.pdf?index=trueIn PDF document text
    • https://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_628b111a21554d418315559593180ad8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gumagabu/5933262171.pdfIn PDF document text
    • https://3f735f5a-cd1c-4288-bd93-adeff6e084d9.filesusr.com/ugd/bcc0e4_2fbc51ec96be46578fc057fbd393cb7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonima/what_is_the_bsa_outdoor_code.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_off0000d43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43E 5148 bytes
SHA-256: c25db59d17708a2ea3f50668763e4ec5147dc9140b6e6b2a28bc1d41436ed70f
font_01_sfnt_off0000e5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B3 10300 bytes
SHA-256: a5b11687aaabc70f369abcef1dd4b4af26bb11bec83b73d0eab05cc004c3df96

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