Malicious PDF — malware analysis report

Static analysis result for SHA-256 360529f9f84b0d0c…

MALICIOUS

PDF

77.8 KB Created: 2021-03-31 14:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a1a2a0e21a9a9810eff8f0fee8fc24cb SHA-1: cb97cc64f2a656373794c82d0a03286e68d132b9 SHA-256: 360529f9f84b0d0cdd580b5b45db61d4159b2c7a80e2c1887bb7745b0cc0ff76
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous external URIs, with one specifically pointing to a suspicious domain 'xezojetit.ru' which is likely used to host a phishing page or distribute further malware. The document body is heavily obfuscated and unreadable, suggesting an attempt to conceal its malicious intent. The presence of multiple links and the overall structure align with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/award?keyword=los+almoravides+en+al+andalus+pdf PDF link annotation
    • https://dasewukux.weebly.com/uploads/1/3/5/9/135956745/63ca871c61add35.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/gmRjbif/fazeviridotoz.pdfIn PDF document text
    • https://xirofepomare.weebly.com/uploads/1/3/0/8/130814083/6c4cc58dad1f.pdfIn PDF document text
    • http://niwifara.22web.org/wings_of_fire_free_download_in_kannada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5fe9e6e862edb.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/eK8uA6e/fofuvoxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448346/normal_603995c0071cc.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/giifhjI/50788140643.pdfIn PDF document text
    • http://nopatoveji.22web.org/probability_theory_live_ion_saliu_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426944/normal_605369fe0beab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_602d303ec4373.pdfIn PDF document text
    • https://cdn.sqhk.co/lokojagivel/hbBjagd/lapafigidopuk.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/Zijhdic/65974959183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5fdb823519e09.pdfIn PDF document text
    • https://towelekuw.weebly.com/uploads/1/3/1/4/131406253/5455664.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_430805afae8b44b4bd5514741e09ee7c.pdf?index=trueIn PDF document text
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_5face2be68d9485a8d5aaccafa09777e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/gojemode.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/roku_2_remote_wont_pair.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/foxoruw.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/xifure.pdfIn PDF document text
    • http://divapikej.rf.gd/how_to_learn_formulas_fast.pdfIn PDF document text
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_601d88a291fc4306b623ced5372b309d.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_off0000f0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BF 5188 bytes
SHA-256: 203720e8dd3d140cdc9208b6297113b65e30d5d090abfc7b359f9cfd98e9000c
font_01_sfnt_off00010259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10259 11696 bytes
SHA-256: a3228fc9a089470aa330a26eb032308b6aeb8fac736aad9da92ae2ea99ddbb2a

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