Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b814b959e28dc0a…

MALICIOUS

PDF

218.2 KB Created: 2021-03-17 23:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb476d921203e9c72661d1b8cc68d736 SHA-1: 419ac353d5ecad3df6d90d0b507a74b109f32924 SHA-256: 8b814b959e28dc0a2226585c1cfe7a5071276e9f925ee20599911899d6a828cb
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9861

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/award?keyword=embedded+linux+primer+%25E4%25B8%25AD%25E6%2596%2587+pdf
    • http://igcopyrightclient.com/spiderman_the_movie_game_apunkagamesml1pm.pdf
    • https://static.s123-cdn-static.com/uploads/4489586/normal_5fffc0a19076b.pdf
    • http://kir.center/fasubopoxamizufepo6kj4.pdf
    • https://cdn.sqhk.co/kubibosujiko/hieichd/89665278643.pdf
    • http://midarujiwuvi.mygamesonline.org/what_is_an_unloader_valve_on_a_pressure_washer.pdf
    • http://blockhcain.host/joke_what_is_the_hardest_part_of_a_vegetable_to_eats0dci.pdf
    • https://static.s123-cdn-static.com/uploads/4464313/normal_5ff3bbcd26aa7.pdf
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5fd6a63499350.pdf
    • http://meine-gebuhrenfrei.com/14169479895zor03.pdf
    • http://prodson.fun/59091019039jxww8.pdf
    • https://cdn.sqhk.co/sebutarukaw/haghif9/setanusebusuv.pdf
    • http://sixesijilolun.mywebcommunity.org/aminoacidos_sinteticos.pdf
    • https://cdn-cms.f-static.net/uploads/4392666/normal_604e6c6649e38.pdf
    • http://pawusewi.sportsontheweb.net/biregutipuganufa.pdf
    • https://cdn-cms.f-static.net/uploads/4408879/normal_600eaa106a699.pdf
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5fd2a67719e32.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7787ed0a-4684-4b67-a9b3-1cd00e1e6558/fuxuxemesovadegimirubalat.pdf
    • https://uploads.strikinglycdn.com/files/01132edd-c716-4a3e-93ec-b7e7167ee1f7/long_langstroth_hive_-_free_plans.pdf
    • http://jubogaju.atwebpages.com/osprey_publishing_list_of_books.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f25d.bin
afc1c95f9f98dbccdfed97b1e19e604e9c7a1e67a125c64cc936a570c577ce09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF25D 179772 bytes
font_01_sfnt_off00030130.bin
293fe1ce95feff83484e80987484091b263439f192ea634ff14e983d3ccadefe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30130 3112 bytes
font_02_sfnt_off00030c35.bin
190781e77f2b739f3ebf043f8ba8766e997b55d7b76dbb0cf0b971fd67a3102f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30C35 4964 bytes
font_03_sfnt_off00031d05.bin
e2e14049f1642a35c740d0ff83c72584326a5aa7c9dd334ffc47ea5231c17536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31D05 10600 bytes
font_04_sfnt_off0003419b.bin
f30dee97049be9486f88286cd27f440b23a478558c7e67267c2f80a8fc0e6b57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3419B 16232 bytes

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