Malicious PDF — malware analysis report

Static analysis result for SHA-256 d086d42d5deb1888…

MALICIOUS

PDF

73.5 KB Created: 2021-03-24 23:37:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5babec4809b27611969736435ef8307 SHA-1: 9be939d92bd62160b9e33877d2ff365c5aada663 SHA-256: d086d42d5deb18880ee3dbdff275154ec4935d170aec16012ecbf8e1a661e38d
156 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous URLs points towards an attempt to redirect users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=dodge+ram+symbol+meaning
    • http://jobediniberine.scienceontheweb.net/gokexokegarerofixadel.pdf
    • https://takazomidiki.weebly.com/uploads/1/3/4/4/134470224/buwikupujekixex-fufafabamutok-tapalilakasig.pdf
    • http://janafan.scienceontheweb.net/jekipumifilexewerolomi.pdf
    • https://ganizosu.weebly.com/uploads/1/3/4/4/134434359/77fa7c.pdf
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/ragokilujof-gesasila-livuvereziz-nalejagetuf.pdf
    • https://runejaluzado.weebly.com/uploads/1/3/4/6/134644060/sekin.pdf
    • https://tebudewuve.weebly.com/uploads/1/3/2/6/132683230/9692498.pdf
    • https://regujimupakuve.weebly.com/uploads/1/3/5/3/135348903/dowexaxipefuv.pdf
    • https://rurinigumiza.weebly.com/uploads/1/3/5/3/135350695/mukemumi.pdf
    • http://netolenogafa.getenjoyment.net/71688583089.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xuboxigaxa.rf.gd/52684215724.pdf
    • https://uploads.strikinglycdn.com/files/8b27b846-2ff9-44b3-9a7b-4418e90c7379/how_to_connect_soundpeats_wireless_earbuds.pdf
    • http://sarutufasiko.atwebpages.com/55958547463.pdf
    • https://uploads.strikinglycdn.com/files/fd19120e-1b0c-4c1c-8b0c-ea3023219089/29293749536.pdf
    • https://uploads.strikinglycdn.com/files/f74f1d8f-89a1-46e4-80bb-10ec2dbb4383/30354378011.pdf
    • https://uploads.strikinglycdn.com/files/0f8481ec-5beb-4230-bad0-edcd640b3996/fiddler_on_the_roof_movie_song_list.pdf
    • https://uploads.strikinglycdn.com/files/83a6a2f7-e28b-4b7e-a663-bc5c2c9659f1/what_is_the_makers_diet.pdf
    • https://uploads.strikinglycdn.com/files/42dc59ba-0e8e-48aa-8738-7a638f6187e0/65267903317.pdf
    • http://koxunum.epizy.com/81727566403.pdf
    • http://nitubak.atwebpages.com/medscape_physician_compensation_report_2020.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e26f.bin
6e196b1c92906443b0fe454fd0cfb350946d4bdc49ee831d3565309fe8caa6b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE26F 5384 bytes
font_01_sfnt_off0000f4b2.bin
5cb10bfe34f7212d57bfdb25ff98d4685f9e70779d057c1088b69b6b79b27d6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B2 10676 bytes

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