Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68e449626371397…

MALICIOUS

PDF

80.8 KB Created: 2021-04-20 23:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 514725f18a459134c07499699976a0b8 SHA-1: 15b4f8f141774ad96d0e3d319f3cb4ea2be2b812 SHA-256: d68e44962637139721a058b4d69733fc87eb993edf519cb4c5328f4040dcf22b
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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 an invoice-themed 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 0.9994

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pelibifir.ru/strik?utm_term=freelance+writing+jobs+online+uk PDF link annotation
    • http://banujal.iblogger.org/masaseje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381740/normal_5ffb97c818f93.pdfIn PDF document text
    • https://cdn.sqhk.co/xizaxulubezu/e79ihOj/77528829240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413013/normal_602d7f74224ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479902/normal_602e1bc846406.pdfIn PDF document text
    • https://cdn.sqhk.co/wetilusogaki/4VjbmmE/bhoot_aaya_video_song_free.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/Rhgcidk/cubic_sandbox_mod_apk_0._3._0_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475570/normal_602709188484d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370762/normal_60029716b3a5f.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/cvigGj4/beautiful_dreamer_movie_cast.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412773/normal_6067e9f4178ac.pdfIn PDF document text
    • http://boxapuxa.22web.org/61605388480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482848/normal_601df83bb5795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483388/normal_603bd5c11d483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_6012e81b9bc93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488346/normal_5ffb88f19805c.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/gelawiweza/8838190118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fee040-c8dd-4d0d-9098-09c122010187/why_did_the_spanish_armada_fail_to_conquer_england.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e41c724-fb92-4c14-8d2c-81bcdff9d06d/komekawigusu.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/13925740461.pdfIn PDF document text
    • http://pekanob.rf.gd/sepole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cda67417-f032-41c8-90dd-af5d92a12a9c/dasamobemob.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/zone_7_planting_guide_flowers.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_off0000fe55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE55 5296 bytes
SHA-256: 1d36ed984a8f8fcfa3cc4c6ea9519a154d6ce785e1d0a676f3a58f1392738fd0
font_01_sfnt_off00011080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11080 10900 bytes
SHA-256: 172c40e679a7d81df74e2dca21a2c5e966bb35fe65bc18af4b3660790d1a74e2

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