Malicious PDF — malware analysis report

Static analysis result for SHA-256 26771998ff0c50f1…

MALICIOUS

PDF

75.5 KB Created: 2020-11-24 16:36:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b98ab26351bc044dd9e42093ae1ead2 SHA-1: 7d92f77707257ec49da48e4994c45f995582704a SHA-256: 26771998ff0c50f11365988a410909d48694ac913a9955906c8e35e58a30913d
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO poisoning and phishing. The primary malicious URL identified is traffnew.ru, which is likely used to redirect users to a malicious site. The document's content, though heavily obfuscated, appears to be a lure related to 'Nikon ml l3 instructions', suggesting a phishing attempt to trick users into visiting the malicious domain.

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://traffnew.ru/strik?utm_term=nikon+ml+l3+instructions
    • https://kiwemedorupa.weebly.com/uploads/1/3/4/4/134446537/a1e3db6c8.pdf
    • https://naxupezo.weebly.com/uploads/1/3/4/3/134350891/9858612.pdf
    • https://nixejovebomir.weebly.com/uploads/1/3/1/3/131380485/44885bb6cf9b11c.pdf
    • https://gonupedifi.weebly.com/uploads/1/3/4/5/134524362/eeb78.pdf
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5fa0b83850836.pdf
    • https://sabijodamibig.weebly.com/uploads/1/3/0/7/130775907/193cbfd.pdf
    • https://robesiso.weebly.com/uploads/1/3/4/5/134501854/8058847.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7787ec09-852f-45be-9385-867edf3d2a88/kezexerijovizefub.pdf
    • https://uploads.strikinglycdn.com/files/2aa66b1d-83da-4cca-bd78-00cb0b8f4511/76076514737.pdf
    • https://s3.amazonaws.com/wixanarer/bitmap_image_into.pdf
    • https://uploads.strikinglycdn.com/files/71931b8c-6690-4019-9d5f-517c4fbd8885/legal_document_assistant_near_me.pdf
    • https://s3.amazonaws.com/gumagabu/palette_iu_gd.pdf
    • https://uploads.strikinglycdn.com/files/da9941a3-4483-4b97-8bc7-cdff2fdf0bcc/when_is_open_enrollment_2020_healthcare.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_off0000ec28.bin
81276b77642fa26baa4e4297015ceb1cc09e5a8c31e658afeffadac0dfca954a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC28 4932 bytes
font_01_sfnt_off0000fce8.bin
410c02b333ca31434fbc3ed2e075244894b26daaf5868fe2bdf3f95f22b3dfac
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE8 10588 bytes