Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a5d74b4cc0e7a9…

MALICIOUS

PDF

75.4 KB Created: 2021-02-24 21:05:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 645bf7b9fa6466a9c9ccac34ac283024 SHA-1: 95832ab9e7bf4739be30b62e3f1bf08f9e974001 SHA-256: 68a5d74b4cc0e7a9294e0fb089e7d9cb5f0c32b09814fa926d77d29e9dc9834d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files on various domains, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of numerous external URIs and the PDF structure itself suggest it's designed to redirect users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://baarspo.ru/strik?utm_term=how+to+change+toro+recycler+22+blade PDF link annotation
    • http://reduslim-buy.site/classification_of_heart_failure_guidelinerrxam.pdfIn PDF document text
    • https://neluposu.weebly.com/uploads/1/3/4/3/134369170/dexuratidevu.pdfIn PDF document text
    • http://jogemijafiw.22web.org/xagebimula.pdfIn PDF document text
    • https://bapumora.weebly.com/uploads/1/3/2/7/132740837/6914010.pdfIn PDF document text
    • https://gidapozu.weebly.com/uploads/1/3/1/3/131379371/7fa0bf.pdfIn PDF document text
    • http://lightly.store/acer_laptop_price_philippines_cheapestal31w.pdfIn PDF document text
    • http://jopimutedu.iblogger.org/frozen_printable_coloring_sheets.pdfIn PDF document text
    • https://metolokinazez.weebly.com/uploads/1/3/1/4/131452743/fewemejameleb-guwiwosekobi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nolewepanuvaxup.epizy.com/maxajasezopereduxotibiz.pdfIn PDF document text
    • http://derizarage.epizy.com/mogasizufowuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/ost_cambrian_period_you_are_beautiful.pdfIn PDF document text
    • http://jonemif.epizy.com/telugu_new_audio_songs_naa.pdfIn PDF document text
    • http://vusevupitiwo.rf.gd/bejogitogojulu.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/angkor_wat_local_tour_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/54972641164.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/97565126952.pdfIn PDF document text
    • http://funazowo.rf.gd/baixar_sketchup_2019_crackeado_portugus_32_bits.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/vumanej.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/full_movie_video_player_app.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_off0000e914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE914 5448 bytes
SHA-256: 142d355b71911a229074bd847aa5ae0a19e45e280fc84e5e3a1e14d81c7fdb75
font_01_sfnt_off0000fbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAD 10684 bytes
SHA-256: 42b06c09d8bc6a05dc9de579d955f92a542f3c8fd24b1fe3928138c2e0bbcea3

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