Malicious PDF — malware analysis report

Static analysis result for SHA-256 2355327cb8a36762…

MALICIOUS

PDF

76.7 KB Created: 2021-01-09 18:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d98250dba79d389e9fdb3d5590f4e6f SHA-1: 76400f5ae58c609b73fd2bb0033753184fea193c SHA-256: 2355327cb8a36762b638259c1adef9b517c0a3d9b7c3a9309d5303d26af21ccd
244 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links to external websites, a common tactic for distributing malware or conducting phishing campaigns. The heuristic firings indicate it's a malicious redirector and a link farm hosted on disposable infrastructure. While no scripts were explicitly extracted, the nature of the embedded links suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=piggy+boom+old+version+apk
    • https://minufufigazibur.weebly.com/uploads/1/3/4/5/134528603/lewipubojigev.pdf
    • https://guxemufisi.weebly.com/uploads/1/3/2/7/132710659/658699.pdf
    • https://cdn.sqhk.co/numovasovev/aiePhfM/robot_war_gangster_crime_mod_apk_unlimited_money.pdf
    • https://lenusasifelodu.weebly.com/uploads/1/3/4/3/134350773/gakopixe.pdf
    • https://gegiritofizupog.weebly.com/uploads/1/3/4/6/134644009/niraven.pdf
    • https://zixojubagever.weebly.com/uploads/1/3/4/6/134613499/jozibiketuvogexu.pdf
    • https://famofupogatom.weebly.com/uploads/1/3/0/7/130739443/2256329.pdf
    • https://cdn.sqhk.co/wavefekus/giidpji/23102231591.pdf
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/lokapomigiso_xudebadolum.pdf
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/rukefawumi.pdf
    • https://zugufanebuloko.weebly.com/uploads/1/3/4/0/134016669/c7ec99a66.pdf
    • https://vujipobunovopo.weebly.com/uploads/1/3/5/3/135324227/dulevakojekibe.pdf
    • https://dujekiwirole.weebly.com/uploads/1/3/4/2/134266498/8176829.pdf
    • https://cdn-cms.f-static.net/uploads/4446759/normal_5fbc1885bc839.pdf
    • https://static.s123-cdn-static.com/uploads/4379603/normal_5fecc3318051c.pdf
    • https://losanuritajog.weebly.com/uploads/1/3/4/7/134730792/xifazejivod.pdf
    • https://venifamu.weebly.com/uploads/1/3/4/5/134501621/8095000.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf7b.bin
e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7B 2952 bytes
font_01_sfnt_off0000da09.bin
caaf7f3ad04677fd3bd6b92adb5baff5291ff0b60593ee5cae1841d0576f36bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA09 5648 bytes
font_02_sfnt_off0000ed36.bin
1bed4c6ec8ab6cd18777e3181e8e9d0414bb3fab833224d3b97b017728c27cf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED36 10256 bytes
font_03_sfnt_off00011088.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11088 16036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.