Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca234413d48095cb…

MALICIOUS

PDF

81.1 KB Created: 2021-03-19 09:06:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0517afcc89a8483357d8db90c2a3d62 SHA-1: 7bd072852a5c9f20c7a2a02cfa8187d50efc69f0 SHA-256: ca234413d48095cbae34707e31af1bd18fbd5e42683b5975c0cdd8ffeeef1771
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one suspicious URL pointing to a potential phishing or malware distribution site. The file's structure and embedded content suggest it is part of a link farm designed to redirect users to malicious websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=%25D0%25B2%25D1%2596%25D1%2580%25D1%2588%25D1%2596+%25D0%25BF%25D1%2580%25D0%25BE+%25D0%25BA%25D0%25BE%25D1%2585%25D0%25B0%25D0%25BD%25D0%25BD%25D1%258F
    • https://static.s123-cdn-static.com/uploads/4392463/normal_5fc69cede268d.pdf
    • https://xogiwudib.weebly.com/uploads/1/3/4/7/134715522/xifakugagedele_maginipu.pdf
    • https://static.s123-cdn-static.com/uploads/4450519/normal_5ff8dcf700a33.pdf
    • https://kibasixeb.weebly.com/uploads/1/3/1/4/131438563/6400607.pdf
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/7605655.pdf
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/052ad979e.pdf
    • https://vunojomilubokub.weebly.com/uploads/1/3/0/7/130775688/davukisegerid.pdf
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/rolile.pdf
    • https://kapelasijad.weebly.com/uploads/1/3/4/3/134312752/3456449.pdf
    • https://fesalepexixid.weebly.com/uploads/1/3/4/6/134660072/8c492f.pdf
    • http://jiwofokiweraw.iblogger.org/20320725200.pdf
    • https://pomapufawupufus.weebly.com/uploads/1/3/5/3/135397804/wewigajurunusobu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_1ff492c5487740ebbfa89de476091c76.pdf?index=true
    • http://losopokatefoxot.rf.gd/99832621186.pdf
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_018ca368a6f34afb8307a124f8f629d7.pdf?index=true
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_c8397a7bb13d42a49eb59491715c6904.pdf?index=true
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_615d6fdd1bd24bcb81c10700bbe85704.pdf?index=true
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_f7b9b6ca5afd4ad9bf4e319e170afd02.pdf?index=true
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_29c1ad70700a4a8dbfbee26a85435349.pdf?index=true
    • http://vavesimor.epizy.com/48730806449.pdf
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_6d11c253a05040d59253d46d3aa83565.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e722.bin
a41b71a9b96bb8ad1c1ff045d008b7689f6376774810110cc957298065c1fcf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE722 4448 bytes
font_01_sfnt_off0000f62d.bin
74bb78ebf47ca940de792b2085463989cf6e4c6fcd936cee12659d05959d394c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF62D 15636 bytes
font_02_sfnt_off000126dc.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126DC 4324 bytes

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