Malicious PDF — malware analysis report

Static analysis result for SHA-256 68518a652dd4556e…

MALICIOUS

PDF

104.7 KB Created: 2021-02-18 05:51:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9e1d2114d5662fc207c1022f8455a69f SHA-1: f06524e8297e0583d01360261743488d3eacfb33 SHA-256: 68518a652dd4556eb96442e9c04bacfb65861eb5f2719b382281f9733dca5c72
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-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.
  • 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://crophysi.ru/strik?utm_term=indian+stock+market+live+software+free+download PDF link annotation
    • https://lodufifed.weebly.com/uploads/1/3/1/4/131411197/sasefaputaz-rerawili-wipekaxa.pdfIn PDF document text
    • http://requiremcgood.com/zodijininanidh8j2h.pdfIn PDF document text
    • https://xupugafowepeg.weebly.com/uploads/1/3/0/8/130814457/samezekomedisag-takiwegolomofu-larutaz.pdfIn PDF document text
    • http://scm03.ru/download_script_diamond_ffdi0ka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379970/normal_5ff5c03b84fdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410418/normal_5fd1ebf380a76.pdfIn PDF document text
    • https://fewegako.weebly.com/uploads/1/3/1/4/131453302/1924229.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/iEgcNKv/82614536686.pdfIn PDF document text
    • http://dithetsen.xyz/car_dealership_bdc_email_templatesk30xm.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/jju4z4k/mipisurovajizivuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/noxuluni/xj4ijii/free_delivery_everything_5_pounds_may_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/Yheih51/water_park_fun_water_slides_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/muzubasiwu/jiT95oe/how_to_draw_cartoons_step_by_step.pdfIn PDF document text
    • https://xonutadeb.weebly.com/uploads/1/3/0/7/130775355/wesug_kaxijakerogute_sejam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404964/normal_5fc61b6063fb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496607/normal_5ffeef488c159.pdfIn PDF document text
    • http://galoomer.online/42256516983cwviy.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/mejados/avocent_acs_6048_datasheet.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_off00015bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BB0 5320 bytes
SHA-256: 38f960a7b1ae393e74f728336d320c43aa410de33f60c902bb94fc22bc4e7297
font_01_sfnt_off00016dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DCF 11448 bytes
SHA-256: 6f46280c2f6f52bcc5b2262535434d69268d1bc80b2d49a8cfb32869fbecf88d

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