Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c44b1db8b0f510e…

MALICIOUS

PDF

87.3 KB Created: 2021-03-06 07:25:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3721bba1be3d4fe4443855f42441810b SHA-1: a65adcb136f026bf688a46d739a22d6c522e92bd SHA-256: 6c44b1db8b0f510ea098419edbf122ba46457b2bb73116fd3f47f131b182ba06
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to 'How to use single serve keurig machine', aiming to trick users into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/123?utm_term=how+to+use+single+serve+keurig+machine
    • https://static.s123-cdn-static.com/uploads/4415519/normal_5ffbc133120dc.pdf
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5ffac053cb0c6.pdf
    • http://p-kavkaza.ru/5788936620157qjo.pdf
    • https://static.s123-cdn-static.com/uploads/4410204/normal_5fc9c7077e9ca.pdf
    • https://wakukorukizine.weebly.com/uploads/1/3/2/7/132712206/wutojebog.pdf
    • http://instapresent.site/artemis_fowl_trailer_itajjhxm.pdf
    • http://italiabeach.space/828932583932f4az.pdf
    • http://topepuxabi.iblogger.org/al_quran_tagging.pdf
    • https://nogigeto.weebly.com/uploads/1/3/4/6/134665346/55708a.pdf
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/gasovekemumi.pdf
    • https://cdn-cms.f-static.net/uploads/4465136/normal_600e5a48c6154.pdf
    • http://walletelectrum.buzz/using_inequality_signs_worksheet3gi75.pdf
    • https://static.s123-cdn-static.com/uploads/4448330/normal_5fec0a27e7aec.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kubuxakul.epizy.com/xurapaxitadulo.pdf
    • https://uploads.strikinglycdn.com/files/4714c2ac-eed7-4afa-a3c8-205fb13195a3/gitefori.pdf
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_b318a1ee965a47d299cf6cae957ba32f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b503f436-8c08-4a39-bed8-0b16d82eabea/xuvotajesexufisukowi.pdf
    • http://gewasitumeve.epizy.com/loxoweragofit.pdf
    • http://mukefuzu.rf.gd/68552160688.pdf
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_fc104aa08c714b90a5845094fd8257ac.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2bc86610-ab89-4051-9886-26efca38fd27/hp_deskjet_ink_advantage_2545_conectar_wifi.pdf
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_503f50fdacb6472db5b3ec69eb6d13b6.pdf?index=true
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_e08e61d528d54e4b9638f7cb89751018.pdf?index=true
    • http://tinijev.epizy.com/spotify_apkreal_ios.pdf
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_45d226e348da44b59024c0559bf465bb.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011517.bin
0a87e3fd6489fabcee2df3d923a6ccb85bb1f17d634452c4f67008ecf68c3c28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11517 5388 bytes
font_01_sfnt_off00012754.bin
749aa25e52502e34ee1a66ffab4eefe0d67636f63d2bec69d0d62f38019869b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12754 11412 bytes

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