Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0a3475f92ff995…

MALICIOUS

PDF

82.8 KB Created: 2021-04-01 19:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4b826694004217c24c7211dba73b3e8c SHA-1: 621b33a178c81115915f22328728a3bbe580f473 SHA-256: 2a0a3475f92ff995d0a8010ccf941f929f4fe96e31c792ecf6c9e4a4a752a9e8
196 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of a link farm designed to redirect users to malicious sites. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicates malicious intent. The document body, though heavily obfuscated, appears to be a lure related to search terms, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ponafet.ru/strik?utm_term=what+is+a+female+monster+called PDF link annotation
    • http://linodogeb.scienceontheweb.net/66119136861.pdfIn PDF document text
    • http://zuragaretezi.iblogger.org/un_metro_cuadrado_cuantos_milimetros_tiene.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/nutagukud.pdfIn PDF document text
    • http://bukejasinopa.22web.org/android_simple_notification_example_kotlin.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/woziziretexewoxovu.pdfIn PDF document text
    • http://pukawezo.iblogger.org/jukuwowokijuji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gowasofejav.rf.gd/tawojataguwojape.pdfIn PDF document text
    • http://kevikawimal.epizy.com/speaking_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/misironofumasowawazoreve.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/14768680135.pdfIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_60650a7d8757478e8452f427c1c8aaac.pdf?index=trueIn PDF document text
    • http://tikobonojaxax.epizy.com/metric_conversion_worksheet_2_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/ruvinijigapatexotosu.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/58039019454.pdfIn PDF document text
    • http://zotuxegusam.epizy.com/mozukofepesozubaxugugi.pdfIn PDF document text
    • https://404c0e03-56c4-4888-bb84-d9d32a71a3e4.filesusr.com/ugd/100e2e_85b3d5353ec14c2eaa54679510d189f4.pdf?index=trueIn PDF document text
    • http://labiwuju.rf.gd/kogovojemuz.pdfIn PDF document text
    • http://giduzorim.epizy.com/wakoxozoluzoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/bozitasegojatedigewigivel.pdfIn PDF document text
    • http://noxumalog.onlinewebshop.net/ceramic_materials_science_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/dinomonekevikudelofijo.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/conversation_english_class.pdfIn PDF document text
    • http://tosijikis.onlinewebshop.net/kodasibojebun.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/52264774128.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/bittersweet_life_full_movie.pdfIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_d8f8128c8f2d4f3caec82f53aef027c3.pdf?index=trueIn 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_off0001078f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078F 5272 bytes
SHA-256: 99057b689f5a599ec6902fa7b314dc98b6d2aea80cbc95e16dcb87b7fd666a77
font_01_sfnt_off0001195d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195D 10488 bytes
SHA-256: 8d857023ade88e12eebb35ec74458c6bb0bab620d53ad5f6d1e81fc705c3dc9a

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