Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1bfbad22fb6c461…

MALICIOUS

PDF

71.8 KB Created: 2020-12-18 21:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 51aacd75c3189805f8626ad4d51a2a47 SHA-1: c42eb27b8f823c476d5313a7476cb8e4b21e723f SHA-256: d1bfbad22fb6c461c8572a2c6920428902f0003363296982e1b0dc3a52799b26
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-confidence ML detection and ClamAV signature for a phishing trojan. It includes a link disguised as 'Brownie household elf badge requirements' which redirects to a suspicious URL, indicating a phishing lure. The PDF structure and embedded content suggest it's designed to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafftec.ru/strik?utm_term=brownie+household+elf+badge+requirements PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5fbc3db6716b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460060/normal_5fd60d05ba155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494440/normal_5fd99036020da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465559/normal_5fad73572d5e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5fd628d05e75f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394062/normal_5fc478e73047b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426572/normal_5fc5bd3f52e42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5fa5dc076cda0.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/tesotiwapax/best_beat_maker_program_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc539263398ff75154a2945/t/5fc95bc8643685382bcbfc89/1607031761432/64672491116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d96a3f-a84b-4489-b134-6d95dfe711bd/52606980042.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/cambio_climatico_onu.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/kuzaguniso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a92e7fb2-3c65-45e5-b68e-c2ff656d5dcf/garmin_etrex_12_channel_gps_manual.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_off0000dbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDA 5728 bytes
SHA-256: f83a739ec9840e462cc13b049d1ad309ac9c16e85d495bfd2f5a0c2e13d78f14
font_01_sfnt_off0000ef34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF34 10116 bytes
SHA-256: 6b14da5d17c5c23d53eb0eef5114ba60dbe7301e1c017645268a751a693f1daa

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