Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf264b5e62cfeb28…

MALICIOUS

PDF

66.4 KB Created: 2020-11-18 20:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e044d9d8234f400b881e2b72fe3f13ab SHA-1: bfbf11f89f106864dbdd30ee7efeba55a0445708 SHA-256: cf264b5e62cfeb2832cc5fb582fc1f51ae130956e0225b2d677213d701922201
214 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of embedded links suggests an attempt to direct the user to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://gettraff.ru/123?utm_term=dr.+debra+soh+age
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/bigiluxa.pdf
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/xoposuromi_pigebizofi_faguwine_jofumarazekumif.pdf
    • https://cdn-cms.f-static.net/uploads/4393506/normal_5f9007aba66ba.pdf
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f9e113048a32.pdf
    • https://kagadema.weebly.com/uploads/1/3/4/4/134456650/7382355.pdf
    • https://beritugemob.weebly.com/uploads/1/3/4/3/134332724/lemukuzik_xukapewefaf_wabixurugivodex_dizirumutema.pdf
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/rezovovob.pdf
    • https://bididanigatozum.weebly.com/uploads/1/3/4/3/134314142/378a4b23474d0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/66fda454-c709-4d54-afc4-f282e47090f0/82803965077.pdf
    • https://uploads.strikinglycdn.com/files/abbb46fe-5d45-428e-8143-aade4dba53f7/clicker_wireless_garage_door_keypad_manual.pdf
    • https://uploads.strikinglycdn.com/files/82cbfa12-87aa-4285-bd58-6bed62e48491/munaliwufejadilosa.pdf
    • https://uploads.strikinglycdn.com/files/ae874483-4624-42a1-a82d-888b85ae1659/paperbacks_from_hell.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_off0000c7b7.bin
a229814ecfa5d70829496483a21d051460865492014dc6de5ee4cb87059452fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B7 5228 bytes
font_01_sfnt_off0000d97e.bin
5e5f3e8d744abdcd834a1002a832a99bdc2a559b837f4b6139491a1c87975ea2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD97E 10500 bytes