Malicious PDF — malware analysis report

Static analysis result for SHA-256 29edff99e1c6a73a…

MALICIOUS

PDF

70.1 KB Created: 2021-06-10 14:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cd5e8dbad09f7baaf974b491564dcb6e SHA-1: cccc9f75e72dd9237bd0d1e1a3f06b7af1c0c05b SHA-256: 29edff99e1c6a73adf80006885e9bd668028dcab5ffe72d8d26d6e4a3d8c57d1
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a common lure for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/pbw?utm_term=jacquees+since+you+playin+album PDF link annotation
    • https://bakogala.weebly.com/uploads/1/3/1/3/131384254/wadenikad-wabasuruweg-gulebutukexo-zeboxaxo.pdfIn PDF document text
    • https://fitabidik.weebly.com/uploads/1/3/0/7/130776693/febujipomiwaga.pdfIn PDF document text
    • https://tedaliduvif.weebly.com/uploads/1/3/5/9/135957254/xarirofevekibiz_doworomasoxe_poforutoj_valesar.pdfIn PDF document text
    • https://pejetoli.weebly.com/uploads/1/3/1/4/131454808/f78479d015ac0e5.pdfIn PDF document text
    • https://pusigodumutujor.weebly.com/uploads/1/3/4/6/134610993/tibewutugupe_weroferat_xiwuk_zevamewolaxoni.pdfIn PDF document text
    • https://nijupafubowawiz.weebly.com/uploads/1/3/4/0/134012726/4059872.pdfIn PDF document text
    • https://gininigexaviw.weebly.com/uploads/1/3/5/3/135350692/3291218.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb013e7-be85-45ef-a777-7a16eb16257d/can_ipod_nano_7th_gen_get_apple_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f1e67a3-d96c-436d-92b9-aea5925f8d51/why_doesnt_my_primo_water_dispenser_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d922cbc0-be69-488a-a847-e3f8ee6ed5db/craftmaster_water_heater_thermostat.pdfIn PDF document text
    • http://rozeluf.pbworks.com/f/wind_beneath_my_wings_piano_solo_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57934909-c0b3-4213-bf1d-7cd00f9e5e4d/darkest_days_of_the_year.pdfIn PDF document text
    • http://lenivuzuk.pbworks.com/f/practice_3-5_the_polygon_angle-sum_theorems_worksheet_answers.pdfIn PDF document text
    • http://nagaxop.pbworks.com/w/file/fetch/144811260/free_download_roms_for_ppsspp_gold.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7bb40da-6622-4b25-8f07-e7070f7933ad/faa-h-8083-30_en_espaol.pdfIn PDF document text
    • http://vadibun.pbworks.com/f/zozalub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c8c531-0a5d-4025-ba46-20b777c7ae2f/juligivuxiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/853347b7-c398-4f3e-b7cd-3b05352bf83e/ge_eterna_dishwasher_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be7aed34-0e11-4e89-94bf-4d11abee7d1c/vuxigurisevimaxinode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4214d98b-0c0e-4998-9834-13510ffa1547/why_is_ahsoka_so_popular.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/f/how_to_make_a_fillable_form_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba609dc2-cd7d-459e-8b35-e010f6c3cfea/26067670544.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_off0000d157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD157 5340 bytes
SHA-256: 6d8f1d7295c929be6de7c7f28a601fd0905de9cb0b3f4f4875e63af39ee0d4d9
font_01_sfnt_off0000e37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37A 11768 bytes
SHA-256: cc41c246c83ddc87bc952432c2b152291f0ed5f2a553091601bc96d447bca940