Malicious PDF — malware analysis report

Static analysis result for SHA-256 418378ea718abf20…

MALICIOUS

PDF

94.6 KB Created: 2021-03-14 07:16:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 454ca0e6c6e1582bbf81913213796265 SHA-1: fe7094999e552cca63f7d67d3ed851d4f52bb202 SHA-256: 418378ea718abf201765a60ca757a3fb2b9f7626f7af4a24ab036da90ed7264d
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. One prominent URL, https://xezojetit.ru/strik?utm_term=what+is+non+linear+development, is directly embedded. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely serving as a lure to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=what+is+non+linear+development PDF link annotation
    • https://pixamowogiru.weebly.com/uploads/1/3/4/5/134590731/9e37338.pdfIn PDF document text
    • https://sawawinuta.weebly.com/uploads/1/3/1/6/131606003/nofopadatawasaf-zugisomer.pdfIn PDF document text
    • http://hookup666.site/97266732657y1mh.pdfIn PDF document text
    • https://visofamawuri.weebly.com/uploads/1/3/2/3/132303269/dobezixozovitoxemuva.pdfIn PDF document text
    • http://tryraisins.pro/how_to_understand_maths_very_wellb42qi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493578/normal_5ffc585635fc7.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/VYieigi/50307991888.pdfIn PDF document text
    • https://cdn.sqhk.co/saxuxaka/Cgfpyjb/zirizoruk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5fcc186766f2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_603fe8a2d1ed0.pdfIn PDF document text
    • https://ropaligezavizaf.weebly.com/uploads/1/3/5/9/135962070/basefiwex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493245/normal_5ff4b75c97dc0.pdfIn PDF document text
    • http://bestsaleshopin.xyz/px_dp_dip_and_sp_in_androidzxauj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_c0eb320a102b4918bf1f0a64fdf1dfc6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vutame/30217482428.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/how_to_solve_a_rubiks_cube_the_easiest_tutorial_part_2.pdfIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_5bb72910aa324a6baa638615873aed41.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/wefadujowarudel.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/google_garage_digital_marketing_course_answers.pdfIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_759795394ee440b4a01d76453ddad35c.pdf?index=trueIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_b1010f99c2a64ddea7761e956cf934fe.pdf?index=trueIn 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_off000118b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B7 5272 bytes
SHA-256: bb9dd635427b85d57ead4e74d368a660f06b2bb2443abb3f8eb3414808d74fde
font_01_sfnt_off00012a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A85 13088 bytes
SHA-256: 8e11cbc133ccc615f2275ba49ea3da40bd7bf0eef10ff8be758177f0dec31404
font_02_sfnt_off000156a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156A6 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550