Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e3c34c0b3b842f…

MALICIOUS

PDF

67.2 KB Created: 2021-03-22 03:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbae90396fe6aeb5fd79a5ef1de0ad38 SHA-1: 2dad663a78e288f53d1bda9f91ffb3eb80f24550 SHA-256: d5e3c34c0b3b842fc0f1c94578d75f23292e9457477b95e4d2eff76f0a0b3323
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The primary URL, https://soxebez.ru/wix?keyword=vtech+alphabet+activity+cube+canada, appears to be a lure for users searching for specific products. ClamAV detected this as Pdf.Phishing.Trojan, and an ML classifier also flagged it as malicious. No scripts were extracted, but the extensive link farm indicates a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • 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://soxebez.ru/wix?keyword=vtech+alphabet+activity+cube+canada
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/gosezixezatuxapeti.pdf
    • https://datulexajolibup.weebly.com/uploads/1/3/0/7/130738708/ramogemunup.pdf
    • http://adv-workshop.site/vert_shock_fullyqcmo.pdf
    • https://nasijominazol.weebly.com/uploads/1/3/4/3/134366940/7785320.pdf
    • https://juxusuvib.weebly.com/uploads/1/3/0/7/130739690/a68f0fc95945bc6.pdf
    • http://zijaditenup.getenjoyment.net/advantages_and_disadvantages_essay_topics.pdf
    • https://cdn.sqhk.co/xafogatok/lhePhg4/mutants_genetic_gladiators_hack_mod_apk.pdf
    • https://gibiboxovozigux.weebly.com/uploads/1/3/4/7/134722082/d908adcb060782.pdf
    • http://spindlndou.space/university_of_miami_email_for_lifexspz2.pdf
    • http://osthondroz.com/bdo_ramlo_amity_guidee65fv.pdf
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/0513b7d254094.pdf
    • https://cdn.sqhk.co/donoluri/ifgiQgh/xavejodalalukoxu.pdf
    • https://cdn.sqhk.co/toxinize/ghhhiig/66147557327.pdf
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/5de46ab9357bb1e.pdf
    • https://bevotiwi.weebly.com/uploads/1/3/1/4/131437753/d2a02dc66a.pdf
    • http://vetozadep.mywebcommunity.org/fallout_4_companions_mod_xbox_one.pdf
    • https://fojowixejomad.weebly.com/uploads/1/3/2/6/132681658/84eb2a8bf1c.pdf
    • http://winnerslm.space/who_is_the_most_powerful_japanese_god348co.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d6193426-caf5-426d-9f60-a2449bd9fd1a/dezotol.pdf
    • http://kuxemozoxabonag.onlinewebshop.net/26611504853.pdf
    • https://uploads.strikinglycdn.com/files/57e81b67-71bd-4a18-820d-671836e5324a/70201306216.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_off0000c8df.bin
c9e2fd85e75685dbccd95cfcc37a2a96888cadc2807235c2c8b82e6d12643bcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DF 5152 bytes
font_01_sfnt_off0000da70.bin
1d07434b068872bc58392c92b875c8ce7211f6cc01aceb126e48f8b03f53dd11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA70 10848 bytes

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