Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a051b7d19fb662…

MALICIOUS

PDF

75.3 KB Created: 2021-04-14 11:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b24c1c88583963ce6853e6c7ee9191f9 SHA-1: cb963c15772530041305ec964798230bae870e11 SHA-256: 14a051b7d19fb662eff078929f302a238dab3eac0006065d2aac4e18caae9548
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains or link farms, suggesting a campaign to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to 'Stihl fs 90 r price', which is likely a lure to attract clicks on the embedded malicious URLs.

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://jumiwimov.ru/strik?utm_term=stihl+fs+90+r+price PDF link annotation
    • https://cdn.sqhk.co/bebiwamulanu/2RimVje/roxusefinewebapi.pdfIn PDF document text
    • https://dutigopomifit.weebly.com/uploads/1/3/4/6/134611267/wejenino_kuwarezim_visebabizin.pdfIn PDF document text
    • https://pimejowutaviju.weebly.com/uploads/1/3/4/4/134495028/2393052.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/CjfsRhb/18969608046.pdfIn PDF document text
    • https://cdn.sqhk.co/fekoguwiwu/d8aj9jb/kudekip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_601fcbfbe3dbd.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/lUsg3ic/kosixazatojimazasiguravad.pdfIn PDF document text
    • https://wezobugedelu.weebly.com/uploads/1/3/1/8/131856743/3e450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471711/normal_6023dc4b22a4f.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/gijnjjs/bollywood_songs_offline_music_app_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/hazYggY/paporatuwut.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/dgeicaL/cats_movie_premiere_red_carpet.pdfIn PDF document text
    • https://sakolepak.weebly.com/uploads/1/3/4/5/134588428/d0e8fb388ba8a.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/7940476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495997/normal_60225311d73c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gavigepovu.epizy.com/76385016912.pdfIn PDF document text
    • http://kubumoran.rf.gd/fexasima.pdfIn PDF document text
    • http://dupavumomupu.epizy.com/adobe_premiere_pro_cs5_tutorial.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_off0000e82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82E 5292 bytes
SHA-256: e84f953fd087e7b4d3ace90672f07fa172e96cf1c2f6e77a229aac3afc33f6e8
font_01_sfnt_off0000fa31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 11348 bytes
SHA-256: d050fed101522a354c3fbd677c6257ea655a5b355f4a9029aef010e389b190b2

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