Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aedc34ce935e7bf…

MALICIOUS

PDF

67.2 KB Created: 2020-11-25 01:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74488fd3c40c73ade83d6f65dd963214 SHA-1: 5dec240f59963dab93b5a32ca593845d484c2c3d SHA-256: 7aedc34ce935e7bfe921eaf7bd9c7eda8607e90e4c1805cdd480cd6e3249b4c4
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing document and hosts a link farm. It also includes an embedded URL pointing to a suspicious domain, likely intended to redirect users to malicious content. The ClamAV detection further confirms its malicious nature, specifically flagging it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=south+dakota+property+tax+exemption+for+seniors
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5f91d44546960.pdf
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5f8ad1f14c6c4.pdf
    • https://tifazufidamifo.weebly.com/uploads/1/3/4/6/134648747/kopavufonexefux_fijopiko_wevaga_difikaripametu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sisaxu/pijikamiter.pdf
    • https://uploads.strikinglycdn.com/files/26e0e222-6d70-49ff-a6d7-4d0dcf6894a4/english_paper_piecing_templates.pdf
    • https://s3.amazonaws.com/tifuwuw/72265236451.pdf
    • https://s3.amazonaws.com/varoximu/67495585722.pdf
    • https://uploads.strikinglycdn.com/files/70c6e85f-470c-4b48-bca9-22d7b25bf186/6382588800.pdf
    • https://uploads.strikinglycdn.com/files/c9180506-b2c6-4b97-ac91-c6487ffa55fd/nutrition_and_physical_degeneration.pdf
    • https://uploads.strikinglycdn.com/files/62b1e157-5dfa-4ee5-a6a2-f6088f80b932/zarew.pdf
    • https://s3.amazonaws.com/fifuto/zte_n817_manual.pdf
    • https://s3.amazonaws.com/sowewazulejewi/most_electronegative_element_list.pdf
    • https://s3.amazonaws.com/tadovu/85959018697.pdf
    • https://uploads.strikinglycdn.com/files/a6526019-01d8-48b3-8ccb-6439012399da/remejejipexese.pdf
    • https://uploads.strikinglycdn.com/files/3501fc47-b6dd-4c89-9958-75c29eda4dfd/88337988339.pdf
    • https://s3.amazonaws.com/lorifumofelu/nature_wallpaper_images_hd.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca06.bin
9405991a85ff1e06b31b5ccfeb410bcbb1283d9f48446cfd88d792df8ef936aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA06 5584 bytes
font_01_sfnt_off0000dcee.bin
da0e6d161ea01d60e7eb7c6cc582034edc8cc0a188e1c69b5863315985d43a90
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEE 10244 bytes