Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ac0cdfba5784ba…

MALICIOUS

PDF

94.2 KB Created: 2021-03-16 17:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 667ecadea8714a2d97b836211c45d078 SHA-1: a443b459706cb21cd3aa9655fe4e25253d39c6f0 SHA-256: 80ac0cdfba5784ba36bffa97b5c2ee9dc5afbe947572c2c425d0f30642ab5e6c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs and the PDF structure suggest an attempt to create a link farm, likely to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://nipisod.ru/wix?keyword=godaddy+renewal+coupon+forum PDF link annotation
    • http://podarokinsta.site/what_is_collective_unconscious_in_sociology76jdj.pdfIn PDF document text
    • http://bupro.asia/ritadidolevujijevpe809.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478928/normal_5fc69e24b8794.pdfIn PDF document text
    • https://pulapafux.weebly.com/uploads/1/3/0/8/130874232/804a7.pdfIn PDF document text
    • https://sibuzowad.weebly.com/uploads/1/3/2/8/132814892/3915681.pdfIn PDF document text
    • http://keepqifi.space/74659944871ur77q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5ffbdee26b6a0.pdfIn PDF document text
    • http://bellissimo.online/jogutegidemonijic33h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367951/normal_5fffc01ac9e47.pdfIn PDF document text
    • http://50offshop.pro/facebook_android_desktop_ansicht038ky.pdfIn PDF document text
    • https://fupebabo.weebly.com/uploads/1/3/4/6/134601971/xutobubewamexorej.pdfIn PDF document text
    • https://jasujidavoja.weebly.com/uploads/1/3/4/7/134770870/f237a4526b4.pdfIn PDF document text
    • https://wulavaborumutol.weebly.com/uploads/1/3/0/7/130776887/juwal-retebani.pdfIn PDF document text
    • http://cmbmarketing.agency/how_many_questions_are_on_a_permit_test_in_nyimh34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383128/normal_5fe43d420d844.pdfIn PDF document text
    • https://zisifogadudup.weebly.com/uploads/1/3/4/7/134765868/bf376d0.pdfIn PDF document text
    • http://erogan-oficial.site/27401893923rzyui.pdfIn PDF document text
    • http://taher-tcac.com/xogedowujefomoriji0eydg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407749/normal_60206703be0b4.pdfIn PDF document text
    • http://itwow.info/sector_14_noida_pin_code_numberzm6g2.pdfIn PDF document text
    • https://diwoneguni.weebly.com/uploads/1/3/1/4/131407083/2832812.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_a7ead381e20240a39baba4afb459517e.pdf?index=trueIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_6a32fab44f404c6982da9dbcecb166d2.pdf?index=trueIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_fce7d96100c94f948e3a6513d1abe8ea.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C1 5348 bytes
SHA-256: 6335ae19634eea8de94a76ef9a23d2c90fecc97303214f762f214c549a47dc42
font_01_sfnt_off000118f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F5 4372 bytes
SHA-256: 3847038d8e6a41b27dd5a8f2de954790db567cc519b2ee15465277ca336abb63
font_02_sfnt_off000129aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129AA 11880 bytes
SHA-256: 9832a0b4685e67be1490945e768ca118fcca3af9d75621fc85cf4727f7ce8abc
font_03_sfnt_off00015297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15297 16444 bytes
SHA-256: 7cef52fabdf44cd7156ae3ca45276e5fef997ad0c31a2e3b3f65bb4f81db981a