Malicious PDF — malware analysis report

Static analysis result for SHA-256 6204180fc0607d71…

MALICIOUS

PDF

77.7 KB Created: 2021-03-12 19:34:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 6fec7102f9364307cc91b97d7cb7a976 SHA-1: 18bd003722917fae3fec3b1fcd5bd5d4f9330a4e SHA-256: 6204180fc0607d715fc8df2d4c4495af67129cb4c1523f4226b989d691080541
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The document contains numerous embedded URLs, one of which is a link farm on disposable hosting, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://botokaw.ru/strik?utm_term=how+do+i+reset+my+air+innovations+humidifier PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476938/normal_601be652a434a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450259/normal_5ff39c209d71a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492573/normal_601aa3007cc35.pdfIn PDF document text
    • https://cdn.sqhk.co/lagolipumepi/fhdplkY/gasil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391649/normal_5ff4b6c1d29bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416802/normal_602546030132e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_5fe8f13e08181.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426686/normal_5fed60765667e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482415/normal_60305a7c6c096.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/cjjjb3k/stern_pinball_arcade_ac_dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470029/normal_6046010d3f4ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369657/normal_5fde697fa9e48.pdfIn PDF document text
    • https://cdn.sqhk.co/gatavikap/iahjzie/dj_vocal_sound_effects_free_download.pdfIn PDF document text
    • http://allostar.buzz/89330203313sucw1.pdfIn PDF document text
    • http://design-kvartira.info/nba_2k15_apk_hackq19f8.pdfIn PDF document text
    • http://changepass.online/10255642798sy0tw.pdfIn PDF document text
    • http://shtangye.xyz/77184132616r8161.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/eigub2g/the_legacy_of_the_bones_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/97640c56-58f5-47e8-82ab-3c2fb231dec6/jukifogurabopaletupubab.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/apa_references_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5101fdef-33d1-4edd-81b4-42a95c1c8ca5/geometra_y_trigonometra_baldor_nueva_edicin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/280655e7-65c8-490a-befc-b959b43e3037/kaludemukatemovufiwobisa.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/tiritofozewum.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/94703460717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67b25085-7295-462f-a99c-5e6ea2dfd1f2/how_to_clean_glacier_bay_water_dispenser_bottom_load.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ff48a3-a631-4752-9b4e-5b3b9bd799d1/51195563189.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/soundcloud_er_offline_iphone.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_off0000f1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D0 5332 bytes
SHA-256: 3335e1944a4eb2925b0726475050500d5d73716b3235009a31320d0426b7c59f
font_01_sfnt_off000103de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 10928 bytes
SHA-256: 308432553abc5a268aa77564776a98a3a7821f4ddf900299b888cc3303804b28