Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dde88433b2cba5a…

MALICIOUS

PDF

93.8 KB Created: 2021-02-25 07:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ec191322cef43a0b1b717e2237cbb734 SHA-1: c1ccc6f3da4c843fda110a08d849598e7a5152e0 SHA-256: 5dde88433b2cba5abce967214087e4797a62424eff21ef39ce1bb6a358b3d033
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a camper manual, likely to trick users into visiting the linked sites.

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://bologen.ru/wix?keyword=1994+palomino+pop+up+camper+manual PDF link annotation
    • http://roxelejabojafe.scienceontheweb.net/how_to_boxing_at_home.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/hiiVhbd/natitekogupaweketedatuf.pdfIn PDF document text
    • https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/e23f92569b9c951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_603713322a708.pdfIn PDF document text
    • https://cdn.sqhk.co/pawexedibib/qjaie9K/monkey_go_happy_6_level_11.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/ciewZgh/35094465579.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530712/normal_6003414baeb4b.pdfIn PDF document text
    • https://jiwejezagaxu.weebly.com/uploads/1/3/5/3/135325467/kuraroxi_dixikidugeki.pdfIn PDF document text
    • https://vesifumami.weebly.com/uploads/1/3/5/2/135294942/6058747.pdfIn PDF document text
    • https://cdn.sqhk.co/soribivevi/hijfiaq/supplementary_meaning_in_malayalam.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/cuisinart_ss-10_vs_ss-700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389097/normal_5fde33663defe.pdfIn PDF document text
    • http://visemomasa.66ghz.com/powerpoint_presentation_slide_format.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457590/normal_5fc94a513d2c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/what_to_rub_on_a_brisket_before_smoking.pdfIn PDF document text
    • http://nipimixo.epizy.com/babel_library.pdfIn PDF document text
    • http://mukokulag.epizy.com/pevoxiram.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/4258190056.pdfIn PDF document text
    • http://sojisij.epizy.com/91396390264.pdfIn PDF document text
    • http://fewakemuwu.epizy.com/animal_album_song_free.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_off00012428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12428 5104 bytes
SHA-256: 6f313da50ae66f1fb4f0827b57ea045e2937308002689c19d13bfb3b0436ca77
font_01_sfnt_off00013576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13576 17012 bytes
SHA-256: a99d6d866e5a98a52d1c511fbf1f7f2baf592403bfcefe28e2c9db2ca0056336

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