Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0e54bfdef337a7…

MALICIOUS

PDF

120.0 KB Created: 2021-03-29 04:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: acec3a49b964f817e555bc98f5a2a1d9 SHA-1: 0974d6e11e1ba71b7d831c6fea72eadebbc3a5fd SHA-256: bd0e54bfdef337a7f56d765e646481543fb9c7aec1347be177cb58134991aab3
134 Risk Score

Malware Insights

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

The PDF document is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords like 'blockchain lab manual pdf' which, combined with the heuristic 'SE_INVOICE_LURE', indicates a deceptive lure to encourage downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pelibifir.ru/award?keyword=blockchain+lab+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/kixikeli/gTkxgiZ/telugu_latest_whatsapp_status_video_free_download.pdfIn PDF document text
    • http://megopoveguvujal.medianewsonline.com/93744295226.pdfIn PDF document text
    • http://defokozixeral.sportsontheweb.net/30069189727.pdfIn PDF document text
    • https://cdn.sqhk.co/xotakuzazuf/fQibQgj/free_illinois_residential_lease_agreement_template.pdfIn PDF document text
    • https://cdn.sqhk.co/savekedeg/D9Zjdjf/background_gradient_android_theme.pdfIn PDF document text
    • https://cdn.sqhk.co/fesoxuleri/Bggjgjg/strike_ten_pin_bowling_switch_review.pdfIn PDF document text
    • http://mufajaku.medianewsonline.com/57969797721.pdfIn PDF document text
    • http://tularafujebok.iblogger.org/febatabadimewodon.pdfIn PDF document text
    • http://tekupugu.sportsontheweb.net/biruloxenipodegaretolup.pdfIn PDF document text
    • http://noxetoporobosek.sportsontheweb.net/gerobibowopagokaf.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/what_are_the_features_of_a_games_console.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxedanafowa/Rhd7ihI/cruises_out_of_galveston_2019_carnival.pdfIn PDF document text
    • http://zokoxakabu.medianewsonline.com/todaru.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/i1Zgfjj/digital_school_bell_timer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/966783db-a8a5-46de-852e-b737ee0b5a06/food_web_review_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b0bfd11-9821-4cd9-8cff-4ad5a58392e6/jotomuwusurifelunar.pdfIn PDF document text
    • http://pagiburisodu.epizy.com/fiboxuwizenevos.pdfIn PDF document text
    • http://bujijawuta.atwebpages.com/18760165561.pdfIn PDF document text
    • http://jopubijako.atwebpages.com/blaming_the_victims_edward_said.pdfIn PDF document text
    • http://muluwokixo.onlinewebshop.net/can_ryuk_die.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_off000198fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198FC 5376 bytes
SHA-256: b4999d2d27695936a0c5941d77858315d4ed669e0efca0a1e53fc8474142de03
font_01_sfnt_off0001ab22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB22 11652 bytes
SHA-256: 5177994583c2e17bf9a54f73c13c5baa63de3193e20a960872271ff6a7646a92

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