Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae708487027ed1ee…

MALICIOUS

PDF

71.5 KB Created: 2021-03-13 13:31:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 5294391e012030ae2b72eba762b46237 SHA-1: 9a8a0f27a1132f328c933b1e04f1ffb5c99b721e SHA-256: ae708487027ed1ee22c8e44d738b5cbdf174752e065c9c4c56fef72142afe891
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to various domains, many of which are hosted on disposable platforms like Weebly. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/wix?keyword=sony+xplod+52wx4+manual+bluetooth PDF link annotation
    • https://lobavasato.weebly.com/uploads/1/3/1/4/131483685/tezademivawul.pdfIn PDF document text
    • https://fupojipivub.weebly.com/uploads/1/3/4/5/134525069/gegaz_nurul_sikumoma.pdfIn PDF document text
    • http://cetakchantek.com/polaroid_onestep_600_land_camera_manuallqfrw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420748/normal_604a3363582b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427526/normal_5fffb5b9ceff3.pdfIn PDF document text
    • https://zetapowopes.weebly.com/uploads/1/3/0/8/130813904/faxotedevumot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382639/normal_603266c18ec6a.pdfIn PDF document text
    • https://sefovoridufu.weebly.com/uploads/1/3/1/4/131438839/zopokugegor_zupenopunufak.pdfIn PDF document text
    • http://blablablacar.online/how_to_open_bank_safe_gta_5imex8.pdfIn PDF document text
    • https://bamigifumu.weebly.com/uploads/1/3/4/4/134443618/979595.pdfIn PDF document text
    • http://shopeuro.pro/25341234558x2j0w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469104/normal_603b8da74000f.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://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_979da2d45f104630bd1f401d9a0c6441.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/does_john_die_in_rdr.pdfIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_521424bd684d45a99414ce69e6f578b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lukepepe/audio_soundboard_for_android.pdfIn PDF document text
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_42b2b4339e6c4b3790376a82d88d347c.pdf?index=trueIn PDF document text
    • http://netomadutimafe.onlinewebshop.net/fowutezojirefusuxokev.pdfIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_cdd8ad671bcd495187f55f2edee29735.pdf?index=trueIn PDF document text
    • http://vujapoguxesak.myartsonline.com/65409252589.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC726 5608 bytes
SHA-256: d4b207f3a2d3f5135f2e9356d5885f2d7cd3eb055fa81c5346f3800d3a634b69
font_01_sfnt_off0000da32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA32 12260 bytes
SHA-256: bcc09b6725a6c2425899542fb467971e019d9070353faef935fda95d1d88a3d4
font_02_sfnt_off000100d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361