Malicious PDF — malware analysis report

Static analysis result for SHA-256 78018cc1e0cdc597…

MALICIOUS

PDF

76.2 KB Created: 2021-01-03 14:33:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4178668c151ddb88edc7899c43526856 SHA-1: 8fabdda2fd876da82253acf2fce5c9dd2baef3fb SHA-256: 78018cc1e0cdc59708eddfe716c825069b7509e73704daaae9085e7b2078496f
216 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating it is a phishing lure, specifically impersonating Yahoo. It includes a mass of external links, with one pointing to a redirector that leads to a PDF hosted on weebly.com, which is identified as a credential phishing attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites, likely for credential harvesting.

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.
  • 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://dibexawalezi.weebly.com/uploads/1/3/4/7/134760597/64d37ccadf25b9.pdf.
  • 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://traffset.ru/123?utm_term=concrete+sensory+detail PDF link annotation
    • https://dibexawalezi.weebly.com/uploads/1/3/4/7/134760597/64d37ccadf25b9.pdfIn PDF document text
    • https://xerazagas.weebly.com/uploads/1/3/0/8/130813913/zagoxodovimaj-niriromafunatup-lidufarurad-rajogol.pdfIn PDF document text
    • https://vebaxifi.weebly.com/uploads/1/3/4/3/134360040/barakuri.pdfIn PDF document text
    • https://bufujibuku.weebly.com/uploads/1/3/4/8/134862056/motarodo.pdfIn PDF document text
    • https://vesepogexaxun.weebly.com/uploads/1/3/0/7/130740074/6146225.pdfIn PDF document text
    • https://zosujugopaw.weebly.com/uploads/1/3/4/5/134509911/sesaxo-garowiwif-mumuxoduxop-torotubamurowit.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/6746570.pdfIn PDF document text
    • https://rasajelisulozin.weebly.com/uploads/1/3/1/6/131637016/zopakiz.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/luxelula/herschend_family_entertainment_address.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/raditafolevutolegaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65cf0f25-0073-478d-8a08-469e0925304d/extreme_sports_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/three_houses_maddening_mode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/62777636005.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/fivunulukub.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_off0000efeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEB 4940 bytes
SHA-256: f1cd4f06688dbc307e1b960a7f93fd056fa9536aeb5a448cacdb979889bffe82
font_01_sfnt_off000100c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C8 10316 bytes
SHA-256: f5eb22edd2acda8136aec093888de00ab02e8ecfb76e5b18c4bc785c645dc85f

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