Malicious PDF — malware analysis report

Static analysis result for SHA-256 08621af1dc3f84ab…

MALICIOUS

PDF

96.7 KB Created: 2021-04-04 01:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a3a34d6e76d6245ed6618ccbf14c359b SHA-1: 109b81e3c3cca68f4e7b10ad2a54d24bf3883cf0 SHA-256: 08621af1dc3f84ab85a3c25ea83a47008fa70858742b9dde9affd698289fcebd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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/award?keyword=republica+aristocratica+en+el+peru+pdf PDF link annotation
    • http://vkrowl.com/linksys_ac1200_boost_ex_wifi_range_extender_setup7k5jw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471455/normal_6047f3ee01388.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_60055c74e4d17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481155/normal_5fc79bc91c206.pdfIn PDF document text
    • http://davebamonuzove.medianewsonline.com/26828808553.pdfIn PDF document text
    • http://lovupijuti.getenjoyment.net/el_camino_del_guerrero_buff_academy.pdfIn PDF document text
    • http://goligofalu.medianewsonline.com/bozefor.pdfIn PDF document text
    • http://fukijuwevo.getenjoyment.net/85335962072.pdfIn PDF document text
    • http://netolenogafa.getenjoyment.net/zisoninarisipovuwinifupo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408594/normal_5ff51fe78c90b.pdfIn PDF document text
    • http://anrostore.ru/applied_science_mcqvcjti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_600b37f382958.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/36378434955kbac9.pdfIn PDF document text
    • http://indir-kazan.com/wireless-n_wifi_repeater_firmware_v2.51_r2d8vfy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_60142e76a2aba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468296/normal_601f70b887403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393485/normal_601bdf83e5b96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/41850797660.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/que_son_los_dispositivos_de_procesamiento_en_informatica.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/denabetenijozosulitij.pdfIn PDF document text
    • http://wukevivetarapu.myartsonline.com/ipl_2020_full_schedule_file_download.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/gradiente_albumina_suero_ascitis.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/10457642921.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/android_auto_car_stereo_review.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/how_to_learn_sap_for_beginners.pdfIn PDF document text
    • http://gafodix.myartsonline.com/37152727265.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_off000139f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F6 5296 bytes
SHA-256: 5938e44b157ac2e524b15f5edf2ec58bb2fc8b28c5610c5bca5c873f1b409e24
font_01_sfnt_off00014c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C05 12308 bytes
SHA-256: 587346fe040de729af99b3af603297a19fc25655b59413b77e77dd2d1e00ecf9

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