Malicious PDF — malware analysis report

Static analysis result for SHA-256 094710ab4d086eb1…

MALICIOUS

PDF

73.1 KB Created: 2021-03-12 13:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 9edb9023bb0e408af4ee0e3f40c3aac5 SHA-1: d7399b77c6fa942ad56ee77934ac8bff8c7fa923 SHA-256: 094710ab4d086eb19a94a89989ecfd4c2a1b9757c3fcc249e797a0acd47b8834
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, identified as a link farm, with many pointing to disposable hosting. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URLs suggest an attempt to redirect users to potentially malicious content or downloads, possibly related to the 'zombie gunship survival' keyword found in the document body.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/wix?keyword=zombie+gunship+survival+1.2.20+mod+apk+unlimited+money PDF link annotation
    • https://pepesavujol.weebly.com/uploads/1/3/1/0/131071240/dukofixotaxof-kosujowojap-popobazokunewi-medokogujonako.pdfIn PDF document text
    • http://livethailand.fun/werakifiwidovekozavomdt3ba.pdfIn PDF document text
    • https://fuzimisadu.weebly.com/uploads/1/3/5/3/135319831/bimofaroxunajij.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/lijegavoroliponamevel.pdfIn PDF document text
    • http://vasugixoba.22web.org/lazix.pdfIn PDF document text
    • https://ganokupojedozo.weebly.com/uploads/1/3/4/8/134890080/819e2c6.pdfIn PDF document text
    • http://vuvajujuli.mygamesonline.org/best_pizza_in_the_world.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/palowazesaveragibiji.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/how_to_connect_kirkland_hearing_aids_to_iphone.pdfIn PDF document text
    • https://godowipi.weebly.com/uploads/1/3/4/5/134520373/83eb51e8e16b5.pdfIn PDF document text
    • http://fb-copyright-help-from.com/whats_the_fastest_way_to_learn_koreana2j0n.pdfIn PDF document text
    • http://technodom11.com/what_does_tantra_meanexy98.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/because_of_miss_bridgerton_julia_quinn.pdfIn PDF document text
    • https://walowopus.weebly.com/uploads/1/3/5/2/135295279/27e10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_20288c174b0d439d984044c611c03232.pdf?index=trueIn PDF document text
    • http://diribiboturo.epizy.com/sheetal_granites_jigani.pdfIn PDF document text
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_6a589c6635c4472ea501b84e340555a7.pdf?index=trueIn PDF document text
    • http://litiwevapebani.epizy.com/sipefetigezuxokawigok.pdfIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_359c82b2e9ef466e893ecb9e116ede85.pdf?index=trueIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_9e00907b11e54b1eaacc9e447e00a6cc.pdf?index=trueIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_4c9fae8666084f9a8336e34955925c10.pdf?index=trueIn PDF document text
    • http://dolipefutulej.epizy.com/akshara_song_badhai_ho_badhai.pdfIn PDF document text
    • http://meniwaluraruki.rf.gd/colorado_ski_mountain_snow_report.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_off0000df12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF12 6052 bytes
SHA-256: 97f814d0400f75315f19927be28e7794a8f0c32372fcd9b6a630a87198a2e073
font_01_sfnt_off0000f39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39A 10052 bytes
SHA-256: d98b7b1f11838097216947f8e6fd9332d30939c151bf22fdf562f91f394c2907