Malicious PDF — malware analysis report

Static analysis result for SHA-256 3274d689f33375cd…

MALICIOUS

PDF

82.9 KB Created: 2021-03-22 22:58:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d671153de47747b143a27e50ee7a3da5 SHA-1: 70e38dd07e6ac173fd9037a1d3b00fbf6ae73118 SHA-256: 3274d689f33375cd51488ace0f0de93b959f71b4c11df6d3f403fe5b8f3ba7ad
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm, directing users to external websites. One prominent URL, 'https://maypoin.ru/wix?keyword=resident+evil+7+apk+1.01+allfreeapk+com+apk+847m', suggests a lure for software downloads. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=resident+evil+7+apk+1.01+allfreeapk+com+apk+847m
    • https://xonaxogurevof.weebly.com/uploads/1/3/1/4/131453171/jimogiwew.pdf
    • http://maxirem.mygamesonline.org/how_to_clean_dymo_sensor.pdf
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/1137313.pdf
    • https://wemafijape.weebly.com/uploads/1/3/4/7/134775870/rubewamirelusogam.pdf
    • http://sunny-web.ru/how_to_put_a_bissell_powerforce_helix_turbo_back_together85nkm.pdf
    • https://puziwifatewir.weebly.com/uploads/1/3/4/7/134715637/pudikute-sowosawiwigesu-dowitafa-wegot.pdf
    • https://dulupuwo.weebly.com/uploads/1/3/5/3/135393712/7814b7dd7a.pdf
    • http://8gusevshop.space/78666754391quwv5.pdf
    • https://wotuvinuvokotar.weebly.com/uploads/1/3/5/3/135330473/panazimawi.pdf
    • http://reniloze.iblogger.org/air_o_swiss_humidifier_aos_7135.pdf
    • https://ziganuridu.weebly.com/uploads/1/3/0/8/130815115/b1c5fdd35dfb.pdf
    • http://roman-holidays.shop/how_to_unstick_your_garbage_disposalkprc8.pdf
    • https://medadafamu.weebly.com/uploads/1/3/0/7/130775854/7359740.pdf
    • https://rozogefeju.weebly.com/uploads/1/3/1/3/131398259/kurujijagu.pdf
    • https://bopilopuneliniw.weebly.com/uploads/1/3/5/3/135304065/jedirul_gotef_tenisivef.pdf
    • http://drilltech.info/amazing_mathematics_circumcenter_and_incenter_maze_answers24olw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_99a81a93e4a0403dbb83191292d1bc44.pdf?index=true
    • http://xilagerezob.epizy.com/totanekaxi.pdf
    • http://bumejefivoxigo.myartsonline.com/90328461258.pdf
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_e58e054fd08947f6853afd0d8a7c5787.pdf?index=true
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_caf711ccdd69438d919910ad4e6d6c9d.pdf?index=true
    • 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_off0000f810.bin
00c0a141202c10936ceac8b8df9df75720096dbedde9c5fde8d9f3447cbb363c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF810 2960 bytes
font_01_sfnt_off0001027f.bin
c6553aca1f31547a61605bb4eb410a04a8d5c9a4fd3c7c8cbc6807eea0ca7a84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1027F 6020 bytes
font_02_sfnt_off00011701.bin
72ffb3b4d61c3309a933571b521340b35cd991d3d2c4d16f9d0b65dc440649f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11701 11636 bytes

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