Malicious PDF — malware analysis report

Static analysis result for SHA-256 c472b8466196cf3d…

MALICIOUS

PDF

93.9 KB Created: 2021-03-07 07:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b41f303ca73ac629ef34e662b228615d SHA-1: df59326612b0b999424925d95b8b02cced18efdd SHA-256: c472b8466196cf3d5d474be93ca591499e19279b2c6a8692e12e3bc6ab669453
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to 'Burger King UK allergy info', directing users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://gimoguvi.ru/aws?utm_term=burger+king+uk+allergy+info PDF link annotation
    • http://zikapipumimapo.22web.org/laverojusotogilase.pdfIn PDF document text
    • http://50offstore.pro/naguduxijusalorezesiys5ws.pdfIn PDF document text
    • http://peludofnor.fun/sql_server_2008_r2_express_editionrbb6w.pdfIn PDF document text
    • http://discovljzg.fun/photo_to_video_maker_apk_for_pcriq7a.pdfIn PDF document text
    • http://kulapub.22web.org/3467601238.pdfIn PDF document text
    • http://sovaxalute.22web.org/axios_post_form_data_react_native.pdfIn PDF document text
    • http://shoop-fh.ru/sajavutigatohcmhh.pdfIn PDF document text
    • http://zozilejumulis.22web.org/73772058204.pdfIn PDF document text
    • http://health2health.online/que_son_los_derechos_humanos_en_estados_unidosr7l76.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
    • https://uploads.strikinglycdn.com/files/263a13cc-fac4-45c7-81b3-95d38cbd6275/42185030669.pdfIn PDF document text
    • http://wetedezowob.rf.gd/altered_carbon_season_2_episode_3_recap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43f72555-17d9-4776-bea2-b52d065b8168/16061877593.pdfIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_ce8ace54271f4c218b3402d214cf76ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0140687b-93c2-4773-ad27-b7d7803aece0/76662784854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12bee1e-2449-4f7b-a877-291437919d3d/lodepojoxuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c5ce73-521b-4b71-8f3a-cbed35815fa3/can_sex_offenders_go_to_state_parks_in_missouri.pdfIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_0454dee618fb4e4580879537649645ca.pdf?index=trueIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_276d60e3929f45c2b3e85027d294f79f.pdf?index=trueIn PDF document text
    • http://ketened.rf.gd/elements_of_typographic_style_web.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f763fc-9980-49a4-adde-d36280ea2ff3/82026383225.pdfIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_0f5a4c5df1cf43e7b6a71a4e45f445ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e9a896b-46c1-40fd-b6f6-8a011f0ea4f1/how_to_use_krups_savoy_coffee_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e64c760-dd95-4371-9c63-057923deb83e/saltwater_fishing_rods_for_sale_near_me.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_off000121f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F4 4772 bytes
SHA-256: adc711b4036e82df11cfacb51e0b1b79054c90ac2754054c40b53d25848f3b9e
font_01_sfnt_off00013248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13248 12676 bytes
SHA-256: 369d747740f065a9f07782a4afc0d3cf295440dd2ee48f5001e1c5341425c90b
font_02_sfnt_off00015c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C0F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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