Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe418469e4f2dddf…

MALICIOUS

PDF

78.0 KB Created: 2021-01-06 08:21:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 571a90effeb0af7b6d140eaa6ecf826a SHA-1: 34b8327d59c4c0149d3e49c9b90097ef89b0a31e SHA-256: fe418469e4f2dddfb738bdd871ad1aa19070ba3a16b984f29b7f5605febe7974
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many of which point to disposable hosting services and redirectors. One such redirector, traffking.ru, is known to host malicious content, and the ClamAV detection indicates this PDF is associated with phishing and trojan activity. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack pattern involves luring users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/aws?utm_term=airdroid+apk+mod In PDF document text
    • https://folitovuf.weebly.com/uploads/1/3/1/4/131406115/5cbb6d5782b.pdfIn PDF document text
    • https://vufizirisabewi.weebly.com/uploads/1/3/4/4/134443644/bejapu-zonudivizared-latuderaru-vomitenodaxosav.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/jfjiyhe/vojilawavukiko.pdfIn PDF document text
    • https://gemujofu.weebly.com/uploads/1/3/4/3/134372819/wajidelinibefanu.pdfIn PDF document text
    • https://gogodelile.weebly.com/uploads/1/3/0/9/130969080/e17d2ebf69.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/v9idEt2/jewagaxolivugebagasanuj.pdfIn PDF document text
    • https://cdn.sqhk.co/munoforifuso/shfjfjh/skywars_map_download_1._8.pdfIn PDF document text
    • https://fofulusi.weebly.com/uploads/1/3/4/7/134774969/wenujekomu.pdfIn PDF document text
    • https://cdn.sqhk.co/gotofebelu/Tjapiul/bike_race_2019_kannada.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/hijRijD/easy_mobile_recharge_jobs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf642247-1363-4dcc-9a75-548bd08b0532/42858353031.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/95098648842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5bc665f-705f-4312-976a-f4376e260bdf/fate_vs_destiny_in_love.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFED 4948 bytes
SHA-256: b401b08d56c564bb8fa749324918b689a413097e177746b7d4b97fb8b5c4127a
font_01_sfnt_off0000f0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B1 10844 bytes
SHA-256: b89320cc7fa7b478905dc715eb5c15256893f39671472d62897b3e0cd2b2ca70
font_02_sfnt_off000115f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F8 16204 bytes
SHA-256: 1873fa7a539ff00c8c1392723f18eb1e977adbfda941d447d459c5f21b93b389

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