Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b60e15448f4ea9…

MALICIOUS

PDF

81.1 KB Created: 2021-06-04 20:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2627d1df7309eacb6b452af9f7cc9246 SHA-1: cc5c043ed0204d0af6a3e5ce7997e11fb53621ce SHA-256: c6b60e15448f4ea9946a2447e40b3d096c2a21c414f4af599afe479fca92f1b4
226 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. It uses a password-protected-archive lure. 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 0.9983

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://baarspo.ru/123?utm_term=bypass+applock+android PDF link annotation
    • https://jofogeva.weebly.com/uploads/1/3/4/5/134505403/majonoberu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401546/normal_6041a506d34c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390095/normal_5fee87dbd4b4d.pdfIn PDF document text
    • https://supimoxu.weebly.com/uploads/1/3/5/3/135319300/02e757c26ad.pdfIn PDF document text
    • https://lewotivegil.weebly.com/uploads/1/3/4/3/134320996/4646988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_603d625b48d7f.pdfIn PDF document text
    • https://medekegiloninev.weebly.com/uploads/1/3/4/7/134716174/tatusoletolidis_kidowune_pupipuf_budoxoko.pdfIn PDF document text
    • https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/xilede_bepurojoxovu_rigeneguzes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420034/normal_60243f6a70fcf.pdfIn PDF document text
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/ligupaniv.pdfIn PDF document text
    • https://rupanusevufow.weebly.com/uploads/1/3/1/3/131380126/jewududomadaki.pdfIn PDF document text
    • https://bazuditok.weebly.com/uploads/1/3/4/5/134590154/4914029.pdfIn PDF document text
    • https://pobowapikojuga.weebly.com/uploads/1/3/4/9/134903403/7655398.pdfIn PDF document text
    • https://labaveboto.weebly.com/uploads/1/3/4/6/134611097/3132455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449793/normal_6028171e6aeb3.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/4288958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5fd0f00046fca.pdfIn PDF document text
    • https://tukajolikapuz.weebly.com/uploads/1/3/5/3/135346043/9962337.pdfIn PDF document text
    • https://momitoxen.weebly.com/uploads/1/3/7/5/137514133/670317aca085.pdfIn PDF document text
    • https://sisivijujejaliw.weebly.com/uploads/1/3/2/7/132741673/bumema-sazotigizeged-xomapejabevim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_606c001320e7e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7ac4802d-7e04-40c5-89d2-701260a96201/72693843861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3772fc65-2a5c-4a83-92d8-0d9a544be423/kewonepewifezenesefopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81bc8dba-a93c-4095-8486-6cce87369bc2/utilitech_1-hp_cast_iron_convertible_jet_well_pump.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8abc81b-c720-4e05-bc07-b0ea1df6ebc8/kenwood_multipro_sense_food_processor_how_to_use.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6B 4872 bytes
SHA-256: e4ba386f6b5d059c3f2d1c43d5bad4d15ef11cf2ceb9c101f324e9b30eff8540
font_01_sfnt_off0000edf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF2 10920 bytes
SHA-256: ed060da336e8d02a6d217582eb2ea8f53aa3adebb52b09b2775e73722fcaf637
font_02_sfnt_off00011386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11386 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
font_03_sfnt_off0001284e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1284E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333