Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc1c4ca159128b33…

MALICIOUS

PDF

79.0 KB Created: 2021-04-07 09:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcbe697862ae25c6f8391a3ec5c0cbcb SHA-1: d2ac6f5c7c2caf272fade7e843b3210459ccb88a SHA-256: bc1c4ca159128b33270ad602e32c0d778669c1f3bfcca923e006558541609a51
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical finding for a large number of external links, suggesting a link farm or SEO manipulation tactic. ClamAV also detected it as a phishing trojan. While no scripts were extracted, the presence of numerous external URLs indicates an attempt to redirect the user to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=gator+blades+for+john+deere+60+inch+deck
    • https://cdn.sqhk.co/vovewotutal/uhjijrp/words_within_words_game_list.pdf
    • http://xulubapatoso.scienceontheweb.net/how_to_install_a_new_lawn_mower_battery.pdf
    • http://copalofa.site/jimixareligarelivqp3.pdf
    • https://cdn.sqhk.co/rivinodati/jiAj0jf/guzogugubozisimukoxafavij.pdf
    • http://sexedate69.site/sgx_sustainability_reporting_guidelinesz7xvd.pdf
    • https://cdn.sqhk.co/jaziwuke/49ighUV/quad_squad_world_of_dance.pdf
    • https://nitavadokeja.weebly.com/uploads/1/3/1/1/131163909/xulufebaxur.pdf
    • https://pedumodab.weebly.com/uploads/1/3/1/6/131637036/489928.pdf
    • http://rinujajija.getenjoyment.net/ariane_6.pdf
    • http://job-finder.space/winukilofapezabocqm86.pdf
    • https://cdn.sqhk.co/vuwonesi/PjidgLc/bazazogotenowopodizapu.pdf
    • https://gadonivoxe.weebly.com/uploads/1/3/5/3/135331758/3522763.pdf
    • https://cdn.sqhk.co/figegixo/hibXf1u/4745640598.pdf
    • http://kupivse.xyz/53231954758fc2yc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zedilegol/grammar_tenses_exercises_with_answers.pdf
    • http://dipagepe.atwebpages.com/learn_chinese_alphabet.pdf
    • https://s3.amazonaws.com/pokorevalaxex/bedupawerixi.pdf
    • https://s3.amazonaws.com/gawabog/18064869942.pdf
    • http://luvetux.myartsonline.com/dikudovujezuvoguj.pdf
    • https://s3.amazonaws.com/xukanomarexumu/lomibovope.pdf
    • https://s3.amazonaws.com/bulujono/taboz.pdf
    • https://s3.amazonaws.com/saziwijaxodav/runazedotiva.pdf
    • https://s3.amazonaws.com/bupaxomu/vscode_auto_format_xml.pdf
    • https://s3.amazonaws.com/fidobakipivogit/dyson_dc50_service_manual.pdf
    • https://s3.amazonaws.com/vigevot/games_suitable_for_8_year_olds.pdf
    • https://s3.amazonaws.com/debiwelof/skyrim_special_edition_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2e9.bin
3d24a75989c1e7481735434995c75a27b5b437c9ddd584ac61cd3f91ee569862		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E9 5716 bytes
font_01_sfnt_off0001065f.bin
23ffb0dd3167bd16524be31c2780bf71672ae11c934bf1ca9225e1679211169d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1065F 11968 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.