Malicious PDF — malware analysis report

Static analysis result for SHA-256 9736d38ee4295e39…

MALICIOUS

PDF

85.3 KB Created: 2021-04-03 04:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 98f2152a443d20f5a9e790f5a2a3fc5e SHA-1: 2e5c7438fe83d35e66fc66032de9c9f7b501f612 SHA-256: 9736d38ee4295e3945832fa51448b5422ace9a8d9a69393ba6a94a5b1e699d9d
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 0.9992

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://soxebez.ru/wix?keyword=introduction+to+python+pdf+o%2527reilly PDF link annotation
    • http://thepropheticapp.com/juzumanuxozolowufem0u6w5.pdfIn PDF document text
    • http://winoorama.site/what_is_rejuveniqe_oil_made_ofk2uho.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473916/normal_60228798d283a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443803/normal_601cf9cb92b4c.pdfIn PDF document text
    • http://begemotiks.fun/google_chrome_android_hide_status_bar3xse4.pdfIn PDF document text
    • http://sellforce.ru/how_to_charge_shimano_grx_di2fwnit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424672/normal_60171e27c0677.pdfIn PDF document text
    • http://qrettalq.online/can_police_view_old_snapchatsdzknx.pdfIn PDF document text
    • http://rastet-malysh.ru/257118591932jzh9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492600/normal_5fcdcba457173.pdfIn PDF document text
    • http://checkmycredit.info/maths_all_formulas_for_class_10_in_hindieaed0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404103/normal_601b4409f131c.pdfIn PDF document text
    • http://rogevunesopu.medianewsonline.com/30293867903.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/caracteres_ascii_signo_de_admiracion.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
    • https://s3.amazonaws.com/ganubatebedoxez/brandy_song_true.pdfIn PDF document text
    • http://jimarol.myartsonline.com/fitelopipawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c115dd0e-8441-4665-9805-8172709b4b87/how_to_removal_base_from_samsung_curved_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d42ea8c-4b2d-4cc4-ad86-5a0e60cc81d0/fuvedezep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4dff426-02ee-4771-8a67-53f23efc0664/jbl_lsr305_best_price.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/why_is_my_wagner_paint_sprayer_spitting.pdfIn PDF document text
    • http://vowojuxibaxo.myartsonline.com/5023368717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/363b677e-77f7-4dea-bd93-c23cca728a7e/690_roomba_review.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/vabimomisewapuladad.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_off0001011a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011A 4812 bytes
SHA-256: bf20eb6964c7f40e9a6af8400f3c3a3c293d111af2f998644a3953a06f6e28df
font_01_sfnt_off0001117a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117A 11564 bytes
SHA-256: 00af7b317ed888bb3fa63dcc80aa15b2f6e2fd7966ff51375d5ac400e3adb2c3
font_02_sfnt_off000137cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e