Malicious PDF — malware analysis report

Static analysis result for SHA-256 2710790f6e723fe5…

MALICIOUS

PDF

71.0 KB Created: 2021-03-09 22:39:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9829b99331a4f13dc195414dcd7ba37f SHA-1: 44fd291620dbad3c7f46912b5dc9629a820da754 SHA-256: 2710790f6e723fe5c918bc4ce331e11113a66be3981372863292f4bd3c49cd2f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, one of which, 'https://vilenefex.ru/wix?keyword=tera+kumas+royale+guide', is directly associated with the file's content and likely serves as the primary lure. The document body, though heavily obfuscated, suggests a theme related to a game guide, which is a common pretext for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://vilenefex.ru/wix?keyword=tera+kumas+royale+guide
    • http://palikexifumalam.mywebcommunity.org/what_machines_are_in_planet_fitness.pdf
    • https://muvekova.weebly.com/uploads/1/3/5/3/135394778/sipovedikovisosoru.pdf
    • https://kisewosa.weebly.com/uploads/1/3/1/0/131070890/gowob_dexogonofadiwuj_wuvefajomokari.pdf
    • http://mitutepoka.medianewsonline.com/definicin_de_marxista_de_modo_de_produccin_capitalista.pdf
    • http://kupugula.iblogger.org/answer_key_of_prmo_2019-_20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tejugezefufuli.rf.gd/jaxitejetekux.pdf
    • http://nowaginog.epizy.com/android_pie_system_requirements.pdf
    • http://rixibedi.onlinewebshop.net/tetisemuvonixan.pdf
    • http://gabigirinekib.rf.gd/2089328828.pdf
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_0771d89bd45f46aab913191b710b7012.pdf?index=true
    • https://s3.amazonaws.com/wizomoravazub/zowabose.pdf
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_55d61dfb90484643947592a0ceaf20a6.pdf?index=true
    • https://s3.amazonaws.com/dojivewobasuval/antarctic_ice_sheet_location.pdf
    • https://s3.amazonaws.com/lomogas/best_xbox_one_x_skyrim_mod_load_order.pdf
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_cf8498858b304ce09e8261623e0e5bcd.pdf?index=true
    • http://tokavasetalan.epizy.com/kabiguregafef.pdf
    • http://tavarifa.epizy.com/48635539637.pdf
    • https://s3.amazonaws.com/gulapore/bujasoboduforupi.pdf
    • http://gowegonuma.epizy.com/ijrcog_author_guidelines.pdf
    • https://8d537faf-e869-4ed9-a29f-988560fab1dc.filesusr.com/ugd/0cce51_0056f55903924c13b4030ef11e7514b4.pdf?index=true
    • http://toduwez.epizy.com/mediahuman_audio_converter_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d039.bin
df86cc84a69449b55df327d82e79a10be86d09e953b01a40cbe788e2f553df1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD039 5260 bytes
font_01_sfnt_off0000e20a.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE20A 1800 bytes
font_02_sfnt_off0000ea98.bin
189d512520d3395e18d7de4e112bcb5b856891cb9dd8278d48f9cdc27e12cc3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 10624 bytes

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