Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b97e594dcd9614e…

MALICIOUS

PDF

83.3 KB Created: 2021-04-04 00:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d36e90bf983a8e6ec82108e796c31199 SHA-1: 20bc162ee10aa8fca896223d4f34435797b1e34e SHA-256: 1b97e594dcd9614e87874df9ba66690beaccbb42615cbc115492e3377e08a700
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a high number of embedded URLs, many pointing to disposable hosting, indicating a link farm designed to redirect users to potentially malicious sites. The document body, though heavily obfuscated, contains metadata related to a product name and application, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://bologen.ru/strik?utm_term=lg+stylo+4+6.2+hd+16gb+tracfone PDF link annotation
    • http://amandeepsadyora.com/cdigo_penal_de_puerto_rico_20196uqpc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459166/normal_5ff9a65ab1800.pdfIn PDF document text
    • http://7lessons.fun/kembalinya_anak_iblis_full_movie0n3gs.pdfIn PDF document text
    • http://rmk4sale.xyz/47077752617153bx.pdfIn PDF document text
    • http://bavewemelemare.iblogger.org/56368078345.pdfIn PDF document text
    • http://alisabor.design/53026212380slfks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466398/normal_6010959528983.pdfIn PDF document text
    • http://piliwowomerisu.iblogger.org/weapons_of_mass_destruction.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467927/normal_5fcdfc85d9f36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368977/normal_5fdefafac8aef.pdfIn PDF document text
    • http://rapalafipotofuw.iblogger.org/forbes_marshall_annual_report_2018.pdfIn PDF document text
    • http://thechambre.xyz/gesivawedapuwuburuo4v.pdfIn PDF document text
    • http://vkrowl.com/ejercicios_resueltos_biologia_3_eso_oxford8ccum.pdfIn PDF document text
    • http://serviceforyou.site/what_can_vegans_eat_list_of_foodsxf9tc.pdfIn PDF document text
    • http://copyright-helps-team.com/xowaponowakamefedinewobor9aje5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455902/normal_602a0b5498c82.pdfIn PDF document text
    • http://forexgeeks.net/148409831313biky.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_63057d2d8bbc4688b69e783464dbcfc9.pdf?index=trueIn PDF document text
    • http://dufeniwa.rf.gd/kazarobovon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7045cfa-5b2b-408f-8fc7-ecbaf0c2c336/leon_uris_exodus_film_deutsch.pdfIn PDF document text
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_cb5a248040314bb1a5eaf56ecbad63cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbb70c33-1ab8-4494-b27d-dcbc491731ee/stubborn_baby_goat_meme.pdfIn PDF document text
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_39deb3da0ed645f9af47798f0b2e37b4.pdf?index=trueIn PDF document text
    • https://82e7f058-9c2a-4352-8e65-a162d98cde11.filesusr.com/ugd/ba3c76_59b29ba285a14744897dc89212b97a2c.pdf?index=trueIn PDF document text
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_29c33db88747458fa766c2ffafa7d4c3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cc2ddf1-a3e3-4c42-a669-e51781d284c2/texapixa.pdfIn PDF document text
    • http://mowesedapi.epizy.com/gapikikiwal.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_off000105c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C6 5924 bytes
SHA-256: 9daa259516194a60a278658f4541c6363121999c9f0f162465a360b854155995
font_01_sfnt_off00011a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A06 11424 bytes
SHA-256: 76919902075b456e694c8d5bfe91b66af9b2d7ed87b41905d9818ac8b4e7f224