Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92d01e6c4688dd7…

MALICIOUS

PDF

75.2 KB Created: 2020-11-25 03:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5136f53b59ffef101bc11309807d70a9 SHA-1: c7c348e34b48e6c9cb80d9e4d123ea07b967f66f SHA-256: f92d01e6c4688dd7a0a745fee0e8f964ae5683e5bbd169544664658d6250434f
256 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF file contains heuristics indicating it is a credential phishing lure, specifically impersonating Gmail. It includes an embedded URL that redirects to a PDF hosted on weebly.com, which is likely part of the phishing chain. The ML classifier strongly flagged this PDF as malicious, and ClamAV also detected it as a phishing trojan. The presence of external links and the nature of the phishing lure suggest an attempt to trick users into providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://fawubanine.weebly.com/uploads/1/3/4/3/134321827/tonag.pdf.
  • 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
  • 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://traffnew.ru/strik?utm_term=your+freedom+premium+account+free+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f89838d6a1d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392857/normal_5f8f9452efadc.pdfIn PDF document text
    • https://fawubanine.weebly.com/uploads/1/3/4/3/134321827/tonag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fac524bac7aa.pdfIn PDF document text
    • http://www.opentle.orgIn 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://s3.amazonaws.com/wilugugo/english_to_french_technical_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/xufikuloxuputapubeti.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/sacred_cards_yugioh_walkthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/list_of_diploma_engineering_colleges_in_mumbai.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/oblivion_game_manual_xbox_360.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/brain_plus_iq_supplement.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/mebaruxelobiwulib.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000cd94.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCD94 10256 bytes
SHA-256: c852a73029bd7b3601e869606a1d91e6f1a611a8e45466d09724663adacf4b8c
font_00_sfnt_off0000bb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB4A 5416 bytes
SHA-256: 58e42170115c5f3d94322478d620d46c865a68d07d8977977ab025fbe13465da
font_02_sfnt_off0000ea68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA68 11548 bytes
SHA-256: 09bf12ee44e33845725b90daeda47447ee4a74fb718948d114ee518929cab015
font_03_sfnt_off000111b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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