Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc0d6d942c022f2…

MALICIOUS

PDF

72.6 KB Created: 2021-04-30 04:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3fa93bd4f0a77304e41ea33e7e9244b0 SHA-1: 804ee638d87ac43f8433a59152232fdb282394ab SHA-256: 1dc0d6d942c022f2cac8bfb6108f94241a10ec2b5f8b244bbba0b41765bf0fcb
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically referencing 'adobe photoshop elements & premiere elements 2020 bundle', suggesting a lure for software acquisition. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a trojan delivery mechanism. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into downloading or accessing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=adobe+photoshop+elements+%2526+premiere+elements+2020+bundle+-+electronic+download PDF link annotation
    • https://cdn.sqhk.co/tokofape/gigiigN/maybelline_jolt_matte_vamp_red.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/jgcvhdP/dental_assistant_schools_in_las_vegas_nevada.pdfIn PDF document text
    • http://zumbayuliya.online/what_is_the_average_salary_of_a_mechanical_engineer_in_south_africay9qk8.pdfIn PDF document text
    • http://idealica-ufficiale.site/the_walking_dead_s05e03_vodlockerc335o.pdfIn PDF document text
    • http://pabujazinebubip.22web.org/charmed_tv_series_1998.pdfIn PDF document text
    • http://startask.ru/48239163670fi3ih.pdfIn PDF document text
    • https://luderokuva.weebly.com/uploads/1/3/5/3/135325165/sijibevese.pdfIn PDF document text
    • https://kuxaxamolexude.weebly.com/uploads/1/3/4/8/134869233/tesabogevugox.pdfIn PDF document text
    • http://hotloveme.online/prepositions_exercises_pre-intermediateekreq.pdfIn PDF document text
    • http://fomuvegikutidob.iblogger.org/android_studio_build_debug_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pajazovifomu.epizy.com/rurisimukun.pdfIn PDF document text
    • http://legifotuvikib.epizy.com/13387016324.pdfIn PDF document text
    • http://sobajagas.rf.gd/tipos_de_sistemas_operativos_de_telefonos_moviles.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/jotipat.pdfIn PDF document text
    • http://juxudawalugevop.epizy.com/pavaposezuforus.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/ccma_lra_form_7._11.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/2013_jeep_grand_cherokee_srt_interior.pdfIn PDF document text
    • http://xotekibibira.rf.gd/kurofogiralibebixogutudet.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_off0000dd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9F 5020 bytes
SHA-256: 475f0a40229e8230903e86bb9efc358e68a74175166c28123f33ff8c1326cd48
font_01_sfnt_off0000ee88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE88 10868 bytes
SHA-256: 64c80a9e05d86a86e6b3be6dd42cd02e5eac6d7031f93308d029e1cdd878daf7

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