Malicious PDF — malware analysis report

Static analysis result for SHA-256 1349e2fd056c1111…

MALICIOUS

PDF

84.5 KB Created: 2021-04-08 07:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 64c0572539ad33468d5651d1aa074901 SHA-1: b41eb0f9ac0605abfa090d3d11c24f24653eb370 SHA-256: 1349e2fd056c1111b387490b1182cddf71cc560c504c6d139fbc35ff9068365a
186 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the document's structure indicate an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://botokaw.ru/strik?utm_term=how+to+clean+top+load+primo+water+cooler PDF link annotation
    • https://cdn.sqhk.co/bibobovezave/cmYohd0/facebook_viral_videos_today_philippines.pdfIn PDF document text
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/2692897.pdfIn PDF document text
    • https://binapesod.weebly.com/uploads/1/3/1/4/131438069/nuzodikoweboka.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/5jfoPoD/35441512650.pdfIn PDF document text
    • https://zikowipon.weebly.com/uploads/1/3/5/3/135300096/a05331698.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/kexamoxusinixu/air_war_games_android.pdfIn PDF document text
    • https://ef9d90ca-5811-4a1c-810e-75bcfae60121.filesusr.com/ugd/a33af7_966b29ccda3d452c8a125c46fbe746e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ritoma/a_plague_tale_achievement_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e91f219a-4c9d-4808-b8c0-5e7611347fe4/que_causa_la_trombosis_arterial.pdfIn PDF document text
    • https://ac614e2c-2e00-43e4-a80f-2c6bce9fb64b.filesusr.com/ugd/f103bb_caca8383dcd143fcaefaa49a1fe33de8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/ferafigigotutekunawakum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa21b02e-27d0-4f6b-8442-bb88289bb20c/how_music_got_free_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/saganugirojagim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c150c564-21f6-40c1-a52b-d372a972dc40/how_to_use_the_magnum_x7_sprayer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b0f467b-9f6a-4183-8000-38e684ccb767/4731332951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/319ba897-4e0c-4d4b-94e7-7b0d758d670f/dell_inspiron_n7110_usb_3.0_driver_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f20a3f7-4735-4695-82f3-f9e437a605ee/hp_laserjet_pro_400_m401d_printer_driver_download_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e68c23e-f8bb-461f-8c22-ecda1b9dea26/introduction_to_management_science_12th_edition_solution.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 5096 bytes
SHA-256: 1e8251c1b32c30758db6d529b84e3f6d51bc206b212f861278679ced0f5a0f91
font_01_sfnt_off000107dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DC 11600 bytes
SHA-256: 8a1b86b07e19f36be3375cecb8ceb73329c4cf1187ee0e0fe0ed992ec3a6ad17
font_02_sfnt_off00012fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA4 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c