Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ff182f701175f9…

MALICIOUS

PDF

70.1 KB Created: 2021-05-07 00:35:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 99b5cd7116d533ae4ed344c2149d5b17 SHA-1: d8eef33f8dbecb0de2f12597c99aaeaf5d27b26c SHA-256: a5ff182f701175f9adf359345d97c81a9a59a34a750867096e05b3edc64e84f2
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, strongly suggests a phishing or malware distribution campaign. The ML classifier also assigned a high probability of maliciousness.

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://jottigo.ru/strik?utm_term=pampered+chef+rockcrok+pasta+recipes PDF link annotation
    • https://cdn.sqhk.co/zogobadakedu/gcPB3hg/pet_bubble_shooter_games.pdfIn PDF document text
    • http://waliwosodumobu.iblogger.org/1516506615.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/45192648226.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/hbLigiB/nafuzogigozuterubuxane.pdfIn PDF document text
    • https://cdn.sqhk.co/wapuvalapowa/hjKYgcp/33121667140.pdfIn PDF document text
    • http://somubuzesixuwun.getenjoyment.net/school_supplies_vocabulary_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/tixuniwe/iaihfgg/ost_zombies_piano_songs.pdfIn PDF document text
    • http://gekigowegijuvo.22web.org/xisukopop.pdfIn PDF document text
    • http://mazikopipovix.mywebcommunity.org/b_sc_1st_year_math_solution.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_42635fcc39d04c64a85d4e69b8c85e22.pdf?index=trueIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_825579d27c254ad988854803626f4702.pdf?index=trueIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_4b6fd399f82c4416b282b6638dafa1c0.pdf?index=trueIn PDF document text
    • https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_596be08a281e474e94cc60cdeaa5b720.pdf?index=trueIn PDF document text
    • http://kigojiki.epizy.com/96809004804.pdfIn PDF document text
    • http://dasopikabuma.rf.gd/a_thousand_splendid_suns_sparknotes_chapter_18.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb5b43d-4531-4645-b554-3c650534013d/how_do_i_reset_my_hunter_ceiling_fan_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f952c288-2eb8-45c2-8129-f83befe2e77c/makalazipowuwiwex.pdfIn PDF document text
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_056c9469527a4079b84f12d598226d50.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2fa40f2-1a5c-4c1e-aa5a-565ee93d81f6/xejikizoxigojizu.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/diremo.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_off0000d2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DC 5428 bytes
SHA-256: b0ee351ced7b96ee4ffd77275048a60d07847d99ee160b4c8eff789a923e21b9
font_01_sfnt_off0000e52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52C 11144 bytes
SHA-256: 3c8c6a2ec2696b9cf5460739a278337738c57839e4da5ae898b6e3161e8befd0

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