Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2fa7c8d638d078b…

MALICIOUS

PDF

96.9 KB Created: 2021-04-25 17:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 953b692f62990d7b052af00f5d727d7f SHA-1: 0a41dc8a91ed6f40879d44001beaadd21e7e8de8 SHA-256: d2fa7c8d638d078bb3814eac721c9c96aa37a1a5dcb95e4b86750756b1aa39d0
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The embedded URL `https://dugedepap.ru/strik?utm_term=how+do+i+set+up+voicemail+on+my+consumer+cellular+doro+7050` is a primary indicator of the phishing lure used.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dugedepap.ru/strik?utm_term=how+do+i+set+up+voicemail+on+my+consumer+cellular+doro+7050 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465402/normal_6015c49c667f0.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/hdgdHje/dumatuxuwevagemosubetegog.pdfIn PDF document text
    • https://cdn.sqhk.co/diwamukef/hgjgjcp/65094710319.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/ggNmJfp/dragon_village_cheat_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471099/normal_5ff3ae81b9744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474746/normal_5fdba723b5015.pdfIn PDF document text
    • https://cdn.sqhk.co/wevemugas/hihdtji/bootstrap_side_menu_collapse_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495974/normal_602c507bd8fff.pdfIn PDF document text
    • http://puferimu.22web.org/how_do_i_reset_my_roomba_s9.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/NLigz7a/pokemon_magikarp_jump_mod_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475730/normal_60060fc553e2a.pdfIn PDF document text
    • http://kinigusuk.iblogger.org/fosegusovizemefodoxugis.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetozativ/fHlCfQa/80314246045.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vefewubine.epizy.com/reflection_glow_and_soft_edges_are_options_in_the_drop-down_list_of_the______button.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/le_bourgeois_gentilhomme.pdfIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_7c57ff744b16489096955fa743914100.pdf?index=trueIn PDF document text
    • https://4ec63ec4-77bf-4499-900e-7c522af20654.filesusr.com/ugd/35bdb9_ee592938580447738caa1176f41799f2.pdf?index=trueIn PDF document text
    • http://rugafejowa.rf.gd/bosch_silence_plus_44_dba_display_not_working.pdfIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_d6a3f1c3606b487cbe3046bd9d04cdf2.pdf?index=trueIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_2cc719b21c554eb4b784075c1fefbc74.pdf?index=trueIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_4a4420d4454b48ddb51150fc1d7af6a2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/22857615964.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/android_constraintlayout_guideline_programmatically.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D9 5780 bytes
SHA-256: ce048ca96f9e8549fa437ed87560a1007cb5bfcaf14130e0eb4286f274228bde
font_01_sfnt_off00013593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13593 11204 bytes
SHA-256: 653607a349a93de7a44730aa74e66bb2409586c16982f08d4ab68c7b8a6f2f51
font_02_sfnt_off00015c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C0A 16708 bytes
SHA-256: ae071d662603c6916985887f65eb3a0d8f2afc7cc13228f83f812eb11570e47e