Malicious PDF — malware analysis report

Static analysis result for SHA-256 35a0dad6d58578ba…

MALICIOUS

PDF

76.5 KB Created: 2021-03-08 10:49:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 276d42483862a89af92deb88aa3a95ba SHA-1: 52a96ca8b91ef45db5b1b77193b0e6aa015d6dca SHA-256: 35a0dad6d58578ba9e2e56e815cf6e57dcc470ec254183960a78f55ef316a5fd
146 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious phishing content. The 'SE_CALLBACK_LURE' heuristic specifically indicates a callback phishing or tech-support scam pattern, suggesting the document's purpose is to trick the user into initiating contact. While no scripts were explicitly extracted, the presence of multiple suspicious URLs and the nature of the heuristics strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://seumenha.ru/strik?utm_term=cissp+all+in+one+8th+edition+review PDF link annotation
    • http://santaparker.store/how_to_use_playstation_move_motion_controllerzvj4v.pdfIn PDF document text
    • http://funomixukipiv.iblogger.org/beeswax_sheets_for_candles_canada.pdfIn PDF document text
    • https://wiruwopifezub.weebly.com/uploads/1/3/4/3/134345133/xudumuxuxukelerar.pdfIn PDF document text
    • https://kuxifegofemiza.weebly.com/uploads/1/3/4/8/134865321/4243822.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/how_to_check_codes_on_harley_sportster.pdfIn PDF document text
    • https://ronukava.weebly.com/uploads/1/3/4/8/134885886/nesid.pdfIn PDF document text
    • http://voztrans.ru/voxigonulokivisxh4xd.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/kabudikamikixarebosr1dwk.pdfIn PDF document text
    • http://fakts.design/mupavapuv9vmv.pdfIn PDF document text
    • http://parralax.net/pupen5izaf.pdfIn PDF document text
    • https://ropupapufodugut.weebly.com/uploads/1/3/4/6/134650221/vazawusarinite_wavaxebatenisoj.pdfIn PDF document text
    • http://tumbaa.space/paradise_island_apartments_jacksonville_reviewsrrehn.pdfIn PDF document text
    • https://karifizamazo.weebly.com/uploads/1/3/1/3/131383674/xafofij.pdfIn PDF document text
    • http://fruit-ita.fun/565131860145mdhd.pdfIn PDF document text
    • http://unlockdeals.shop/pathfinder_bestiary_1_free5w56m.pdfIn PDF document text
    • http://vezerfa.xyz/mnemonic_dictionary_word_listg2zul.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/noxanovefaxepo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zodumuf.rf.gd/85152239399.pdfIn PDF document text
    • http://konewumabujak.rf.gd/24875799862.pdfIn PDF document text
    • http://lirepemewepe.rf.gd/times_table_from_1_to_30.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/effects_of_globalisation_on_zimbabwean_culture.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/sabiwaxopexadonaravude.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/how_to_use_dyson_cordless_vacuum_attachments.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/char_griller_akorn_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/cheap_thrills_sia_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/fedalitemebufodu.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_off0000eada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADA 5296 bytes
SHA-256: 39a475d72c2042071fa660984f83a2089f0b81a98eec1c18e2108e52a2012787
font_01_sfnt_off0000fce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE3 12132 bytes
SHA-256: f76c8bad655d1c403813d5b0b3b14b274dc5f1d53391105d36ab91c4f0572688