Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4a9001e3924ddf…

MALICIOUS

PDF

75.8 KB Created: 2021-05-16 11:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ff2e29454db1a58072bc87b6c9139e65 SHA-1: b215d41c54457edcd54abdfc3e8d46aa86ecef30 SHA-256: 5b4a9001e3924ddfea2d652a9336e5325b89a35723301994aef97784c97937dd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://gimoguvi.ru/strik?utm_term=set+aside+prayer+big+book+page PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408586/normal_603096d44cae2.pdfIn PDF document text
    • http://kakorezikudu.mypressonline.com/93699108240.pdfIn PDF document text
    • http://luxuwum.mypressonline.com/8403533363.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485457/normal_5fc7ac48c93c6.pdfIn PDF document text
    • https://bokonuso.weebly.com/uploads/1/3/4/6/134604328/dulazekitavetufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462379/normal_5fd280246205c.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/duremigitu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492897/normal_5fe137b52aefb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_602f6281bba4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481156/normal_60550ede20cdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474191/normal_600dc055510c7.pdfIn PDF document text
    • http://ruvikuvi.mywebcommunity.org/83588926542.pdfIn PDF document text
    • https://dolumipekino.weebly.com/uploads/1/3/4/6/134625527/5707535.pdfIn PDF document text
    • https://mefufexuwi.weebly.com/uploads/1/3/4/0/134019004/632078.pdfIn PDF document text
    • https://vugopese.weebly.com/uploads/1/3/0/7/130739154/feccc8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_6033393409d10.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/sifawekujiki/20368755860.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/guwunuwejenonadomizu.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/pete_the_cat_my_white_shoes_read_aloud.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE8 5504 bytes
SHA-256: c8cabad2207c07adc8afbc68179cff13653a3d57db7ad3cb30f338d2180ba28d
font_01_sfnt_off0000fdb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB4 10576 bytes
SHA-256: d8bbc95bb3ecf1be57c2b7eaa377eaf8adeb47ff823f4b4afd6845b4823c6d5c

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