Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85674f17ff34ea6…

MALICIOUS

PDF

73.1 KB Created: 2021-03-05 02:09:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 18c32ec9a6fe12cc7eb6048363d581ba SHA-1: 5b90900118bb13ddb127a415ec587862aa721be2 SHA-256: e85674f17ff34ea64dbc8e1b8a1c4571b27f43b1215cba62246fcb7cd1c73e79
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a ClamAV signature and an ML classifier. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. The embedded URLs and the overall structure indicate an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/strik?utm_term=material+science+jobs+seattle PDF link annotation
    • https://xowitato.weebly.com/uploads/1/3/0/7/130776358/giwuju-pipatemap-jafiwirako.pdfIn PDF document text
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/52815b.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/dheqd98/piano_tiles_billie_eilish_online.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/hdjjd9o/31991079949.pdfIn PDF document text
    • https://ribufesoguvas.weebly.com/uploads/1/3/4/6/134680119/8657734.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466661/normal_5fee379ed55b9.pdfIn PDF document text
    • https://cdn.sqhk.co/fubemabofof/eqiebii/recorder_songs_for_beginners_happy_birthday.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/computer_programming_lessons_online_free.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/rabolafig.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/gemakif/there_you_go_lyrics_kodak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487905/normal_5fc7e64f8e033.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/91743063626.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/how_hard_is_the_padi_open_water_test.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wojibikifi.myartsonline.com/things_to_buy_for_new_house_checklist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e7bad1-1812-4365-893e-2d4dfc74d1a9/do_clarice_and_hannibal_fall_in_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b50e998-41e3-489b-b46f-a2d2ac319e11/jujofedoluvazikepokad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a33f63-3eb7-474a-8c1a-72ffd8b37595/how_to_hard_reset_iphone_5s_without_computer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BB 4800 bytes
SHA-256: 25f89b889cd346bc4c3c18470b3e472e8bd858be10dff096e71e789bd7c59c81
font_01_sfnt_off0000e50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50D 10600 bytes
SHA-256: 1c0281b0582d7688f44b7266f3045d80620baf527eaad2abf02607d4435afea8
font_02_sfnt_off00010963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10963 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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