Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e603040a7b0524…

MALICIOUS

PDF

73.1 KB Created: 2021-04-01 19:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6d5220caeb111f88025afb857799014a SHA-1: 09c003df5339be42315100601d72003fb8533856 SHA-256: e0e603040a7b0524a23d3de49e901f6981379017a16ef75a768ce48608500233
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The embedded URLs and the overall structure point towards a phishing or malware distribution scheme, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://xezojetit.ru/aws?utm_term=norton+field+guide+to+writing+3rd+edition+pdf PDF link annotation
    • https://girakojazesu.weebly.com/uploads/1/3/4/6/134675992/tonopirijus_mupejud_wanazugufovo.pdfIn PDF document text
    • https://worowisirokisid.weebly.com/uploads/1/3/4/8/134856274/bc7ba0c9c.pdfIn PDF document text
    • http://watogoda.mypressonline.com/colpitts_oscillator_download.pdfIn PDF document text
    • https://jiketajaw.weebly.com/uploads/1/3/4/4/134464131/5875630.pdfIn PDF document text
    • http://rudovatimokasum.medianewsonline.com/3924222725.pdfIn PDF document text
    • https://badobokitevobux.weebly.com/uploads/1/3/0/9/130969603/dewaniwasobavemos.pdfIn PDF document text
    • https://tejemovifizak.weebly.com/uploads/1/3/2/6/132681066/devopetumu_zuzatebadamigug.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/dedisalivafobefepulevug.pdfIn PDF document text
    • https://xetibipu.weebly.com/uploads/1/3/4/5/134528590/cbd97a9.pdfIn PDF document text
    • https://zuvofuguwapu.weebly.com/uploads/1/3/4/0/134042474/a273a.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/sibugubop.pdfIn PDF document text
    • https://rugoxeribagiwa.weebly.com/uploads/1/3/4/5/134529694/loluwav-rumagewaborona-puvazozab-bowezolefe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c207dc97-0cc9-441e-8caf-a702c1639d46.filesusr.com/ugd/36abe8_faa340eedb2c41aca7f70c219bb6227f.pdf?index=trueIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_f4f3724c10924e258ea60b93ad953ff0.pdf?index=trueIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_68824e0955b84beb97c1d51b55e8cfaa.pdf?index=trueIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_11bf68c403a6463ebc4d6ab6ef8ff07d.pdf?index=trueIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/aeschylus_agamemnon_sparknotes.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_4758cde870a14560a4a720359b32501a.pdf?index=trueIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_c0044a29c6284adb856ddb23d8e902d9.pdf?index=trueIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_2d01935aad69459ea231e9b0d46404da.pdf?index=trueIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_49e1069f8d6646289c7da4dd75a395fd.pdf?index=trueIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_2ba1549bdd0f42f0a402f1780a16fc79.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E3 5048 bytes
SHA-256: 06e162803e4aad1907078230e0375f55f2c7a0ea04749463ef12eb553cde61e3
font_01_sfnt_off0000db40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB40 10716 bytes
SHA-256: 52759519b9065ec9af29dded6f855818f68e13de1643eb598ac9e457a012d183
font_02_sfnt_off0000ffd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD7 16084 bytes
SHA-256: 462d13bd97d7d9b38b38dac4ddb889f891d4742debcdf3bbf084b15d68e01d41

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