Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c599da3dd832ec…

MALICIOUS

PDF

72.8 KB Created: 2021-02-21 05:37:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e24a4d6fbf056f7dc0e51fe8a1a97a4d SHA-1: 7a2cc6fe9a97b54fbb7879df52f637a6ba580d0c SHA-256: 40c599da3dd832ec4cf2e8d0a0375c9947800f6b3e365ea9272821179d85aa17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, identified as a link farm, which is a common tactic for SEO manipulation or directing users to malicious sites. ClamAV detection and ML classification strongly indicate malicious intent, specifically related to phishing. The presence of numerous URLs, including one pointing to a potential launcher APK, suggests the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://jacksth.ru/wix?keyword=nova+prime+launcher+apk
    • https://legukofa.weebly.com/uploads/1/3/5/3/135318177/5396717.pdf
    • https://poxawakepuk.weebly.com/uploads/1/3/1/6/131606289/e7c519195c.pdf
    • https://voximarabot.weebly.com/uploads/1/3/1/3/131383255/sepaketoveneperakopu.pdf
    • https://cdn.sqhk.co/kuzaxepigi/iekhjii/kooler_ice_machine_near_me.pdf
    • https://cdn.sqhk.co/xurajalijok/PnhadzZ/touch_and_go_ewallet_registration.pdf
    • http://tuzitiniviwodu.22web.org/ionic_covalent_bonds_worksheet_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4466662/normal_5fd3cf96e313f.pdf
    • https://betixajivuf.weebly.com/uploads/1/3/4/9/134900014/3498bc036a841a6.pdf
    • https://nefirekemoziwep.weebly.com/uploads/1/3/4/3/134332842/9528958.pdf
    • https://girezerel.weebly.com/uploads/1/3/1/0/131070389/nitagukol_riloka.pdf
    • https://lizameguxif.weebly.com/uploads/1/3/1/6/131606128/lowure-faboruju-xovixom-badelilogi.pdf
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/d4b469d23274cca.pdf
    • https://cdn.sqhk.co/bitomasijelo/fDIZvif/dijudabogalupuzo.pdf
    • https://cdn.sqhk.co/menigopas/ijDcUlj/nudomagafobepodobudo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://monigadukuze.rf.gd/b._ed_form_2018_hpu.pdf
    • http://kutegabirena.epizy.com/37210804800.pdf
    • http://totofexux.epizy.com/77898984802.pdf
    • http://jimeroxivekafos.epizy.com/fun_halloween_multiplication_worksheets.pdf
    • http://savikolapuxol.rf.gd/telugu_movie_sambaram_songs_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_off0000d48c.bin
38dd1da130274b26c89586f03ec87f156ae4ca4ac9caef55f4c88895002ff779		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD48C 4888 bytes
font_01_sfnt_off0000e4fa.bin
a202fb6051b3ecf1493a96973d01771cd104a13a3b2d539d1935adc6219b3de7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FA 10284 bytes
font_02_sfnt_off00010824.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10824 4324 bytes

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