Malicious PDF — malware analysis report

Static analysis result for SHA-256 0735df38d2687e13…

MALICIOUS

PDF

84.7 KB Created: 2021-03-29 19:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c1bcd753cbbfa3b6d88097b94f2ff89b SHA-1: 4c19743683b9e9063b0366e9599426bb54fed563 SHA-256: 0735df38d2687e13a6d0848cd78387c0d61d1aa2b9459bb2fe637c042cb22e58
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://xezojetit.ru/strik?utm_term=how+to+read+your+electricity+bill PDF link annotation
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/2696743.pdfIn PDF document text
    • https://wikexedijul.weebly.com/uploads/1/3/4/6/134659224/1010523.pdfIn PDF document text
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/8263727.pdfIn PDF document text
    • https://vapevaka.weebly.com/uploads/1/3/1/4/131407737/daram-barik.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/55e7ac.pdfIn PDF document text
    • http://juxeribitu.iblogger.org/37684811706.pdfIn PDF document text
    • https://tiluzapibijodok.weebly.com/uploads/1/3/4/2/134265907/1493874.pdfIn PDF document text
    • http://gemosugobez.22web.org/the_stranger_book_vs_netflix.pdfIn PDF document text
    • https://zatuduxe.weebly.com/uploads/1/3/4/5/134595584/da6f2.pdfIn PDF document text
    • https://deparabijafepoj.weebly.com/uploads/1/3/4/0/134040416/webavabarewabuvupeg.pdfIn PDF document text
    • https://nofuzuvovakiba.weebly.com/uploads/1/3/1/3/131379181/lobeg.pdfIn PDF document text
    • https://ximofutaxa.weebly.com/uploads/1/3/4/6/134626718/ed1f9b4cd4.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/9337599.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/13291260970.pdfIn PDF document text
    • http://milusivisebu.rf.gd/vuvipewin.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/95875386131.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/laniteragifa.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/high_level_disinfectant_solution_log_sheet.pdfIn PDF document text
    • http://xokesuluz.epizy.com/buzes.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/poulan_wild_thing_chainsaw_carb_kit.pdfIn PDF document text
    • http://nikejubefip.epizy.com/busonid_32_mcg_bula.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/driver_canon_mx300_win_10.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/upsc_application_form_format.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/purble_place_game_windows_8.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_off00010cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDF 5052 bytes
SHA-256: 203ae7d1cfa42727427f6fbe861f08c54278c3c6a2e411520fba6e46dcf36abf
font_01_sfnt_off00011e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2C 11476 bytes
SHA-256: 397dd4bedfd7442ec4fdd91a3885e6b37b6a997af582087800f0d67358b2e36f

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