Malicious PDF — malware analysis report

Static analysis result for SHA-256 66191964f36d8319…

MALICIOUS

PDF

92.8 KB Created: 2021-03-10 17:34:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 09e37f7adee283f8abefc0057f1b1ee9 SHA-1: db7e8765e752e4a3821bd150be3f21e547a9bef0 SHA-256: 66191964f36d8319c96f30a0c4b76da6e2ae3ff9473318e1996dc35f2e960915
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9988

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://jacksth.ru/aws?utm_term=girl+red+jamaica+shirt PDF link annotation
    • http://samafutanub.mypressonline.com/asbestos_removal_procedure.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/crp_blood_test_detect_cancer.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/nexulijirapinila.pdfIn PDF document text
    • http://solerizimifo.iblogger.org/50963647966.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/51494227389.pdfIn PDF document text
    • http://wudebakafepi.mypressonline.com/25375701329.pdfIn PDF document text
    • http://manovina.mypressonline.com/senesivukesomeroxi.pdfIn PDF document text
    • http://tamakedesununod.mywebcommunity.org/88310689941.pdfIn PDF document text
    • http://kevakigev.medianewsonline.com/weber_grill_grates_cast_iron.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juludiripo.myartsonline.com/how_to_reset_2014_prius_c_maintenance_light.pdfIn PDF document text
    • http://juludix.epizy.com/poe_labyrinth_boss_guide.pdfIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_a638af41f19b4baeaf13487d6c3edf0c.pdf?index=trueIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_b71a65671c204fe487fa37e046b3acfb.pdf?index=trueIn PDF document text
    • http://bafuwujix.atwebpages.com/98294720332.pdfIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_8fee67d7da4a4c249fe0a04484991d8c.pdf?index=trueIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_3738ea9ff6994713a215437a6c35ee28.pdf?index=trueIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_85d1c8746efd44ec91fcc379dfc46c0f.pdf?index=trueIn PDF document text
    • http://sutakepaxiru.epizy.com/soleus_air_14_000_btu_portable_air_conditioner_manual.pdfIn PDF document text
    • http://vopuxoke.epizy.com/gojuwuzipumuz.pdfIn PDF document text
    • https://f4dd034e-00c7-465c-b850-fb2d75accad5.filesusr.com/ugd/769f78_b1250e7a5f9f45a1b358c6363e6a9645.pdf?index=trueIn PDF document text
    • http://nopugorib.onlinewebshop.net/how_to_reset_locked_iphone_5s_without_computer.pdfIn PDF document text
    • http://gafigozigu.epizy.com/notepad_6._9._2.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C1 3596 bytes
SHA-256: d86beee05ce9b4932e9c118f9287e13bbf3f6da173b6d933ab6b166ce3aad8d3
font_01_sfnt_off000106a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A2 5284 bytes
SHA-256: 7f1812a06dbe4041acdc5841474a5419c789b892cb6b42244d8a1f7484c97d22
font_02_sfnt_off00011869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11869 4620 bytes
SHA-256: 13c4eb30c1557ec57d173be4ef755a2dbab0fdfe11c039e251335a52ebba7b69
font_03_sfnt_off00012587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12587 12180 bytes
SHA-256: cb86698d6148f50c9974609d7fdd353d994c29ae19e8d6520940980da570e362
font_04_sfnt_off00014f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F05 16384 bytes
SHA-256: 27d5aa48a66ed6e24074f1b6b97defbd08161f468927a62883f94c9ec160026f