Malicious PDF — malware analysis report

Static analysis result for SHA-256 0327ae9693dce0c8…

MALICIOUS

PDF

77.2 KB Created: 2021-03-24 06:35:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 05f9d9b6b3f367837ac53d7ecaac491a SHA-1: bf8381f65e4c556aa782ae683a0e7cd964422b68 SHA-256: 0327ae9693dce0c84e13c575d2ff5b7c20679383eef7f40a218cf1645fbbaead
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a primary focus on `https://mezovuduw.ru/award?keyword=javascript+tutorial+pdf+javatpoint`, suggesting a lure to a potentially malicious website. The PDF structure and embedded links point towards a phishing or malware distribution campaign, likely initiated via a spearphishing attachment.

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 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://mezovuduw.ru/award?keyword=javascript+tutorial+pdf+javatpoint PDF link annotation
    • http://pobunav.sportsontheweb.net/jose_maria_arguedas_obras_completas_todas_las_sangres.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/comment_apporter_des_modifications_a_un.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/zapumikugopitefazusepab.pdfIn PDF document text
    • https://kirimanadawa.weebly.com/uploads/1/3/4/3/134383910/eb6d9.pdfIn PDF document text
    • http://turiwovezaz.iblogger.org/15035873156.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427811/normal_5ff1e648be0aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_602d941a11f36.pdfIn PDF document text
    • http://romigeguwapefi.22web.org/antenna_theory_kraus.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/black_and_decker_mouse_sander_pads_wickes.pdfIn PDF document text
    • https://pugubitef.weebly.com/uploads/1/3/5/3/135302221/1a649c1a722ff03.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/493c40bd-7973-4b36-9f58-ee56ef78fd03/wipaxobirupovoxufekebunu.pdfIn PDF document text
    • http://pusagulubuke.rf.gd/5261212158.pdfIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_13585d3fe0eb44a78d06c25b9079e0a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf7d944-f0b4-4806-8a80-120bd43d62ab/warrior_cats_name_quiz_warriorcats.com.pdfIn PDF document text
    • http://zuputes.atwebpages.com/acurite_rain_gauge_walmart.pdfIn PDF document text
    • http://wapudajikipidem.epizy.com/kabesomujig.pdfIn PDF document text
    • http://fiwarirekagugen.epizy.com/3275502040.pdfIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_c1b5d6e42fcd479dacd651580ebb277b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF86 5276 bytes
SHA-256: 0dd5a8445c04381a5ca15e67be20602931f707ba41c4ba95c19f13679a571d9e
font_01_sfnt_off0000f198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF198 10920 bytes
SHA-256: 6aea4bfaf408d8b625e364698d473aac482974af7ffa6a40082a840a443b08cb
font_02_sfnt_off00011705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11705 4384 bytes
SHA-256: e292609cd599ed18669d578e927ab936bd5a8459ba48b66a1af7f168d6a64f8d

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