Malicious PDF — malware analysis report

Static analysis result for SHA-256 c083ae243ceaffbb…

MALICIOUS

PDF

79.8 KB Created: 2021-03-22 10:30:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 05075b02f2bc0619ef9f603ef6d18a95 SHA-1: ceddcd991cf36ccf500a8a78e8de1134947fa244 SHA-256: c083ae243ceaffbb2d5723292d7213f74283930c7ed5ed004c0f140f4c72923f
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'https://lozipotod.ru/wix?keyword=imobsters+mod+apk', which is likely part of a phishing or malware distribution scheme. The PDF's structure and embedded links suggest it functions as a link farm, designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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://lozipotod.ru/wix?keyword=imobsters+mod+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476288/normal_5fffe941ee265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_5fd39cb624612.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412887/normal_5fff0b671e62c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380527/normal_5ff0df957db13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447641/normal_6001711e93e7e.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/the_bronze_horseman_movie_watch_online.pdfIn PDF document text
    • http://zibikudupe.mywebcommunity.org/31093376337.pdfIn PDF document text
    • http://neditaxuvim.getenjoyment.net/tukazor.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/arabic_alphabet_exercises.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/masunusufi.pdfIn PDF document text
    • http://sadinexiwa.mygamesonline.org/96999913087.pdfIn PDF document text
    • http://bijukexamova.scienceontheweb.net/troy_bilt_generator_5550_oil_type.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/los_temperamentos_del_ser_humano.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/74965f22-944a-49f8-8a83-4de80843c30a/how_to_charge_nimh_batteries.pdfIn PDF document text
    • http://neketepa.myartsonline.com/coliform_bacteria_in_food.pdfIn PDF document text
    • http://lavisekenesavof.myartsonline.com/textaufgaben_gleichungen_mit_lsungen.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/18757702084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a5ce250-0d2d-4ba9-9e9a-7bb79854f2ed/39640964109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59fa99d6-e538-4537-af42-9ea0cffa4bc2/how_much_does_it_cost_for_someone_to_make_a_logo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9d747d-271b-41e5-af1f-a27b755a5b8b/python_notes_free_download.pdfIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_77ff53f492d041dbaefbb2a9c69eb0e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec7e56ae-535a-472c-ae9f-cbf188aabe80/21010561978.pdfIn PDF document text
    • https://db7841a4-af10-4990-a2be-f084cd4acbf6.filesusr.com/ugd/e3c460_e200a8bceb1244afaa863c59a1a9c7c5.pdf?index=trueIn PDF document text
    • https://c75ed97e-f406-4d79-b864-c99612e64be8.filesusr.com/ugd/a66d15_449f78b0757d4747ba1952c4d45b17e4.pdf?index=trueIn 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_off0000fc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC48 5216 bytes
SHA-256: c57a05c019db0f3b9008860f0e00e89fe521477aa792f29c88945e9c977c010a
font_01_sfnt_off00010de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE0 10620 bytes
SHA-256: 1ad5038ab6b1534636e67ec42eae4b1395b57f608b571cd1b740916d36432b21