Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0feec47611daefc…

MALICIOUS

PDF

143.3 KB Created: 2021-03-14 14:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 87bac67f3db205888be0916e428134c6 SHA-1: 55d606fe8c7b4e81621c94a4616e45c732b56e79 SHA-256: c0feec47611daefc13fd950d6834b7716acbb181d56bb4365f3dbb3d57ea53e6
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and numerous URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/award?keyword=animal+cell+culture+methods+pdf PDF link annotation
    • https://cdn.sqhk.co/mujowofapubi/iE8nt76/bollywood_party_songs_2019_mp3_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/igWZL9a/jajerobalosamadiwexabowe.pdfIn PDF document text
    • http://jexekiraj.sportsontheweb.net/frigidaire_dehumidifier_repair_manual.pdfIn PDF document text
    • http://jijomaj.getenjoyment.net/zebenefaboduxogusisefej.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/fmhihj3/66474027490.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/Oiegjje/munedizeseratulexogira.pdfIn PDF document text
    • https://cdn.sqhk.co/kifateten/afjjxia/32462549442.pdfIn PDF document text
    • http://livelaj.iblogger.org/undead_warlock_vanilla_leveling_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zenejoku.rf.gd/60846202099.pdfIn PDF document text
    • http://zorijefugixor.atwebpages.com/55236604144.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/comparative_advantage_practice_worksheet_answers.pdfIn PDF document text
    • https://efed9c07-4553-4484-a419-1b844d271aeb.filesusr.com/ugd/6f475a_bc16d49dad4242d3a51da5785846ac01.pdf?index=trueIn PDF document text
    • http://letupekego.rf.gd/citizen_in_the_world_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/fortigate_firewall_90d_configuration_guide.pdfIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_7d91429a3bb34c4ba0e922b4887ed772.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/kedakow.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/buganda_anthem_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/angular_form_reset_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/7._snf_fen_bileikler_ve_formlleri.pdfIn PDF document text
    • http://vomematomeze.epizy.com/add_text_to_online_free.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_off0001f355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F355 5384 bytes
SHA-256: 3c2cccb18c7b7b587980151ea9c11976b777c26428d67ce458598c76b4d1de5e
font_01_sfnt_off00020573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20573 12744 bytes
SHA-256: 67a2a4742f2dfba422cbb06412c5300d46b9b060caae5a13cc8b815b83d46ce5

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