Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f00c6d04c33557d…

MALICIOUS

PDF

75.5 KB Created: 2021-03-10 07:49:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 674b3043cc8ab3a464b410a68fae7846 SHA-1: 9be305ba5b0d2d98fee49b5fe94376da53d6806f SHA-256: 5f00c6d04c33557df1e76c59d9743ecdeb40b1f1dc5fa3a91cff2927ac9aa92f
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 0.9991

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://jottigo.ru/strik?utm_term=how+to+change+belt+on+kenmore+powermate+vacuum PDF link annotation
    • http://delinapod.mypressonline.com/88181989454.pdfIn PDF document text
    • https://cdn.sqhk.co/sewetotab/jAiSehf/lenovo_shareit_apk_mirror.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/bakitevirivowisa.pdfIn PDF document text
    • https://cdn.sqhk.co/zevinikiwi/ifdIjgh/suvadiwamivafokopasomoj.pdfIn PDF document text
    • http://paselon.getenjoyment.net/how_to_change_the_battery_in_the_kidde_smoke_and_carbon_monoxide_alarm.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/51860883326.pdfIn PDF document text
    • https://cdn.sqhk.co/fofubulami/ih6igHa/wugoto.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/poulan_pro_pp4218avx_chainsaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366405/normal_5ff163e8ae05e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_600cc4261d322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407810/normal_6037bef014977.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_00a1243fad4d4bc59331862a8de2feb3.pdf?index=trueIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_b019e6b6c2be46c6872f257c8810e32c.pdf?index=trueIn PDF document text
    • https://ececae0b-1312-4a4c-959a-117928b3d478.filesusr.com/ugd/e6721e_9bdf3ff4fcc64ebcaffd2d66d1edb1a6.pdf?index=trueIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_4b885be6aa9343ef9c3526defebe116e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6861e9ac-2239-415a-8861-9066643b809e/55227755708.pdfIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_f1f02b8beff2490cbdd75b937beb39e3.pdf?index=trueIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_417fe15b4a2b421e9bc1ef0156685705.pdf?index=trueIn PDF document text
    • https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_08c220782f7845a9b5c4e45d15145346.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/df831d63-4320-4776-8adf-18d096552d0e/20596035854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05ca4619-9571-4f05-92fe-51f315588f30/the_chaser_game_show_james.pdfIn PDF document text
    • https://fc060a1e-8c1d-4b7d-bafd-75f79d4c6355.filesusr.com/ugd/c0a468_5e039844a66d426b8f5a59587768e0b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3560698-bca7-4a64-9756-49ff6951a598/pmd_clean_pro_rose_quartz_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de8714bf-be6f-4d08-ba3d-0c05d7eaf26e/microsoft_excel_2013_product_key.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_off0000e8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C7 5488 bytes
SHA-256: ae005587bc94567c337224977a5944cf53eb04fa3ab0b11b02d12632907dcda9
font_01_sfnt_off0000fb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5F 10592 bytes
SHA-256: 6b713478aba16b94c9956e5154b74092f0d071435a3baf1b1f058280f03bce6d