Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e2e54affb8ab3e…

MALICIOUS

PDF

76.1 KB Created: 2021-05-15 11:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b383eb13bd1a302128d6080873e517dd SHA-1: e469cf06267ea918862c199302ba09bfca260d2e SHA-256: 26e2e54affb8ab3ec97feab090cef4141663b1351e2e167ba1903db9083b73e8
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://ponafet.ru/strik?utm_term=how+to+fix+my+squeaky+dryer PDF link annotation
    • https://cdn.sqhk.co/kimejijomaki/idgchhg/lipaxukeramojinoru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_600bcad04322f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485321/normal_5ffa33cb60a75.pdfIn PDF document text
    • https://sikegupul.weebly.com/uploads/1/3/4/6/134681682/wijozafuxavekuvesus.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/dejodipukajogerozomiga.pdfIn PDF document text
    • http://fewudutizoxom.medianewsonline.com/40115720664.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/gkihfg3/escape_game_50_rooms_2_level_5_losung.pdfIn PDF document text
    • http://gazedalepi.sportsontheweb.net/4825988136.pdfIn PDF document text
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/8d4494.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/UMXejic/car_x_drift_racing_xbox_one_money_glitch.pdfIn PDF document text
    • https://kadeniki.weebly.com/uploads/1/3/4/0/134097858/370422c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_277a9589d9d84bcf9f16fad20d16749f.pdf?index=trueIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_1179e9d84ae8450bbae82d7f915553ce.pdf?index=trueIn PDF document text
    • https://05f6fcc2-a4c7-4d5b-b58c-97b640a93f4d.filesusr.com/ugd/74147a_61fe4e1826fc4c9699593517db57dd92.pdf?index=trueIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_cbc7ef1cc42a4ef9ac241fd61c29c6b0.pdf?index=trueIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_9c27158b13694884a27777e6a9f9aaf8.pdf?index=trueIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_6dc9412f91a8462cb2750f36f3fbc50f.pdf?index=trueIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_ff57684a02804b0093c29b1b42c5a9de.pdf?index=trueIn PDF document text
    • https://6ba7316d-b84b-4ccb-a32a-103c856d4013.filesusr.com/ugd/91f37e_15548483198d4873b74552626f9e66af.pdf?index=trueIn PDF document text
    • https://af4bb04d-41a2-413c-b691-ce0a46ff998d.filesusr.com/ugd/e677f8_47198a8f9a6f434cbb58807892bf87ee.pdf?index=trueIn PDF document text
    • http://givetupazowo.onlinewebshop.net/ditogisuwajudav.pdfIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_e9775d39e74249b59b949e984e505ced.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_off0000ed77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED77 5432 bytes
SHA-256: 4ebb6d1e15cce743fc1f1d0d6cb1cb8c6effa2e80b79d354ababf094afe22f0c
font_01_sfnt_off0000fffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFE 10336 bytes
SHA-256: 301a11698162ee2cfac95da587c6d5f1b940022b653a7c4f568b360ae716dc95