Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7c09867b980405…

MALICIOUS

PDF

77.4 KB Created: 2021-05-16 09:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 187d2a04ca96997e331f716c06a7b268 SHA-1: da5ed0fd03bdee0716aee0d4e1c224e58bcbae25 SHA-256: 9e7c09867b98040555a935954061f1fa38fc3c8b439fb699d41a28461c2c7171
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 0.9991

Heuristics 6

  • 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.
  • 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://botokaw.ru/strik?utm_term=how+to+use+lean+methodology PDF link annotation
    • https://bufigolumixi.weebly.com/uploads/1/3/4/2/134234787/6223a.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/GRhejfZ/49840346760.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/giaXigU/kinawubaketoso.pdfIn PDF document text
    • http://bidimiw.sportsontheweb.net/68657045068.pdfIn PDF document text
    • https://laropavo.weebly.com/uploads/1/3/4/5/134585926/gixonujamole.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/jgjgWAo/ultimate_background_eraser_online.pdfIn PDF document text
    • http://veviwumifuvemuz.mypressonline.com/blucher_wargame_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/7tzljja/21036497450.pdfIn PDF document text
    • http://dusipoweg.mywebcommunity.org/strength_of_materials_singer.pdfIn PDF document text
    • https://giwuvapelefawi.weebly.com/uploads/1/3/4/8/134869604/gorajolaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/lukedivibeb/igqjcsA/granny_chapter_two_escape_hack_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/JhcmjdU/chemical_elements_listed_by_atomic_radius.pdfIn PDF document text
    • https://cdn.sqhk.co/newupulig/dhaibH3/itunes_windows_10_without_store.pdfIn PDF document text
    • https://gitutibilaralib.weebly.com/uploads/1/3/1/3/131384503/jezipem.pdfIn PDF document text
    • https://cdn.sqhk.co/kugugofawaz/gjsgihj/metal_shooter_run_and_fight_video.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/XjhTifm/20307063953.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/oZyAKND/avery_8163_template_for_hockey_score_sheet.pdfIn PDF document text
    • https://nijomusuvul.weebly.com/uploads/1/3/4/6/134671469/5b40d07837b043.pdfIn PDF document text
    • http://wotaged.22web.org/malayalam_kambikuttan_net_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mewowoji/ya0hiJy/noirmont_tower_jersey.pdfIn PDF document text
    • https://cdn.sqhk.co/lilodipu/jfV5wha/clark_griswold_christmas_shirts.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://vubapapi.epizy.com/65666497774.pdfIn PDF document text
    • http://jifaradazuzigo.rf.gd/typhoid_fever.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_off0000e439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE439 5132 bytes
SHA-256: 246ac880318cfe6bbafcd6dac24856d2347b46bb15ab6827c00f95397dc8ad72
font_01_sfnt_off0000f59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59A 10768 bytes
SHA-256: e359b77e0ad3f849d84cf64316a9bacd12d8060b9930786ffcf4c42966c7c53a
font_02_sfnt_off00011a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A30 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361