Malicious PDF — malware analysis report

Static analysis result for SHA-256 c88736d8770d9458…

MALICIOUS

PDF

80.9 KB Created: 2021-03-11 08:24:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 605ded6f3ce8aa852d85e269a686fda4 SHA-1: 44c02d4c2f95a17d2de582eb8cddec070aeff3b0 SHA-256: c88736d8770d94589bb2e18d174cc88b8503904e7839283c06ff03aa3393d581
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with at least one, 'https://maypoin.ru/123?utm_term=poweredge+r840+server+datasheet', appearing to be part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a server datasheet, aligning with the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/123?utm_term=poweredge+r840+server+datasheet PDF link annotation
    • http://jakartapro.xyz/pubikubredtg.pdfIn PDF document text
    • http://intekzafast.online/what_is_daymond_john_known_foree7uc.pdfIn PDF document text
    • http://megahit.space/aesthetics_philosophyahexv.pdfIn PDF document text
    • http://usesol.xyz/harga_sony_alpha_350_barup71fr.pdfIn PDF document text
    • http://farirawefufiz.iblogger.org/86775182517.pdfIn PDF document text
    • http://itasda.online/firetutunepalesifofumif7w3u.pdfIn PDF document text
    • http://chestlune.online/bikuwavelidodoburabugoemwgt.pdfIn PDF document text
    • http://agent-ritual495.online/38392164588yp5sn.pdfIn PDF document text
    • http://alisaborodaenko.design/jojoguwezekifod2anjm.pdfIn PDF document text
    • http://lordtrans.ru/information_security_analyst_jobs_in_atlanta_ga9rsoa.pdfIn PDF document text
    • http://fitnesspack.net/kogawiki8z4is.pdfIn PDF document text
    • http://pakizimavom.scienceontheweb.net/68720417222.pdfIn PDF document text
    • http://agencymedia-ig.com/giresepox172e.pdfIn PDF document text
    • http://umdtheatre.ru/cloudy_with_a_chance_of_meatballs_cast_260oai.pdfIn PDF document text
    • http://hurleyshamburgers.com/char-broil_3-burner_propane_gas_grill_with_side_burner_reviewfsea1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://rumapipenuwiwo.rf.gd/el_poder_de_cambiarlo_todo_download.pdfIn PDF document text
    • https://72dfff08-f6cb-4f5d-aaac-ebe71175d6a6.filesusr.com/ugd/c268f7_05d0a4bbde504e679a1314734bc39d0a.pdf?index=trueIn PDF document text
    • http://xepuzakudera.atwebpages.com/5_love_languages_apology_profile.pdfIn PDF document text
    • http://xifabopopotesa.epizy.com/winatolekipolowiwalotis.pdfIn PDF document text
    • http://wovuluvoju.onlinewebshop.net/chicco_mini_bravo_stroller_reviews.pdfIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_e883d51cafef45ea9d7a87f219a52957.pdf?index=trueIn PDF document text
    • http://ziwebizivag.epizy.com/baileys_almond_milk_nutritional_information.pdfIn PDF document text
    • http://vijoputu.rf.gd/remasilozofujopodulu.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF1 5632 bytes
SHA-256: 27510f7a7425400242e946bce1374aed5e661445b5874bbcd958fa52ae843c2c
font_01_sfnt_off0001002d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002D 5712 bytes
SHA-256: 9747d8082da4308565c9e0c359900c79532d572f24205e54e9c85e8f55c9fa49
font_02_sfnt_off00010e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6A 11588 bytes
SHA-256: 2db3ebb343e06af7a31548111e2bde35b91e44a504fb7b1c6cb7c0843056a63d

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