Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f44242de150ae46…

MALICIOUS

PDF

73.5 KB Created: 2021-03-24 06:46:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3b96d04b52989f00cee236c459ec6d3 SHA-1: dd2b4355bf666a93eb91d24a5c41cef83142cb60 SHA-256: 7f44242de150ae46cd1b5eb5a7e2c078a01ca1da5bbbf52584dbcf0fbc427147
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, suggesting it's part of a link farm or used for SEO poisoning to direct users to potentially malicious sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://maypoin.ru/wix?keyword=forklift+manual+krisbow
    • https://cdn.sqhk.co/kajipazuto/jgeHzhc/nidefipirisuz.pdf
    • https://cdn.sqhk.co/mamozinuba/jcib6hh/minecraft_2d_game_download.pdf
    • https://cdn.sqhk.co/runudori/f8qijif/lokipuxipuxijamabelu.pdf
    • https://cdn.sqhk.co/disonixures/L6ifK1k/fitness_ball_exercises_for_back_pain.pdf
    • http://finofubamu.mygamesonline.org/deductive_reasoning_and_strategies.pdf
    • http://sawedes.mywebcommunity.org/brother_mfc_7340.pdf
    • https://cdn.sqhk.co/melipetoluf/HjeSRjb/tumew.pdf
    • https://ripumoravoramex.weebly.com/uploads/1/3/1/6/131606135/zugesitajigasu_zijojija_rogovewi_fidufum.pdf
    • https://peliretoru.weebly.com/uploads/1/3/3/9/133997281/8624006.pdf
    • https://cdn.sqhk.co/baxajufim/CQhhvhh/mlb_playoffs_bracket_2018.pdf
    • https://febelozo.weebly.com/uploads/1/3/4/5/134599394/lemefo.pdf
    • https://mukoxorokote.weebly.com/uploads/1/3/4/5/134576398/9101141.pdf
    • https://cdn.sqhk.co/tumowara/nijhdWH/pandemic_board_game_rules_simple.pdf
    • https://cdn.sqhk.co/gesaxamadew/Gjbdbji/benji_bananas_adventures_hack_apk.pdf
    • https://zamikife.weebly.com/uploads/1/3/1/6/131606416/xevebimozunisupun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://buzanuziti.myartsonline.com/encyclopdie_plantes_mdicinales.pdf
    • https://s3.amazonaws.com/fumiposamisur/malaguena_piano_sheet_music_free.pdf
    • http://zegetafirotazaz.atwebpages.com/employee_contract_letter.pdf
    • https://s3.amazonaws.com/wupiwupiwot/graco_nautilus_80_elite_expiration.pdf
    • http://siniligavaxuvul.onlinewebshop.net/mcdougal_littell_algebra_1_practice_workbook.pdf
    • http://kakavogulogij.onlinewebshop.net/jomolakigulavasosip.pdf
    • https://s3.amazonaws.com/xuzed/nomokikofaxaz.pdf
    • https://s3.amazonaws.com/mujevubutukoxu/drew_brees_injury_report.pdf
    • https://s3.amazonaws.com/jenagubadopi/31230873049.pdf
    • http://lumosaneja.onlinewebshop.net/la_casa_delos_espritus_filmaffinity.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4f9.bin
715d5eb34209d61ae027e4cfc5921db1520d793e32cfdfa40d6155b3d07fe1a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F9 4928 bytes
font_01_sfnt_off0000e59f.bin
f7fa09ba0158ae6919d737970d5cdf5c42115326a2ec7f0a7495789999db8315		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE59F 10376 bytes
font_02_sfnt_off000108de.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108DE 4324 bytes

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