Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45232a85f7e9e45…

MALICIOUS

PDF

72.0 KB Created: 2021-01-10 07:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3916fb29a9b17b8031ed006f07abd569 SHA-1: 89db114e73586d79651930806ea5bcc28a8047b9 SHA-256: e45232a85f7e9e4510ac93f9e172a1b7b235101d61bc98e257542f783671ab9a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-themed, suggesting a link farm or phishing attempt. The primary URL, trafffe.ru, is associated with search terms related to car parts, indicating a potential lure for users seeking specific items. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafffe.ru/wb?keyword=range%20rover%20l322%20off%20road%20wheels PDF link annotation
    • https://cdn.sqhk.co/tavolimogid/ggShghg/wwe_network_free_version_app.pdfIn PDF document text
    • https://cdn.sqhk.co/desiruzag/dheigie/52785068390.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/nidanuwujexoru-surav-zevalifejego.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369185/normal_5ff5eb3ce3e90.pdfIn PDF document text
    • https://cdn.sqhk.co/mavozopofug/dsVpwhh/nuwemezegomavakejafaw.pdfIn PDF document text
    • https://cdn.sqhk.co/sawusuzi/IMwAhjK/world_war_2_books_for_young_adults.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_5f8c796645986.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/juliziwojatige/examples_of_trump_being_chief_administrator.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/arm_cortex_a9_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/abraham_toro-_hernandez_scouting_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/noneruw.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_off0000d813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD813 5624 bytes
SHA-256: b1d492fe016cdd66cf6b68c8283c2954cfc9cce102a085ce03da21ba1faba789
font_01_sfnt_off0000eb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4D 11776 bytes
SHA-256: d7af96c1cd08ec7902a60977646701e2e6ad2867b618047f59b1777f778e4f87