Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9d745f489acf7b…

MALICIOUS

PDF

81.1 KB Created: 2021-03-26 07:59:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d3c0d6a531fdc27becbcf957de51f767 SHA-1: 2af1f1ea42974e596d868eed0f08ae9d58f25a66 SHA-256: fa9d745f489acf7b2d4f5e486aa503d3241111c6907ec82e517f1d0327155cc1
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though partially corrupted, contains a lure related to resetting a Honeywell thermostat, which is likely a pretext to encourage link clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gimoguvi.ru/strik?utm_term=how+to+reset+honeywell+thermostat+rth2310b PDF link annotation
    • https://cdn.sqhk.co/tavaxikanabu/jgcWjhZ/95565150895.pdfIn PDF document text
    • https://cdn.sqhk.co/pogadidotilu/jhsjenr/one_gun_stickman_hack_apk_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/dsgf1ia/bokutolubabelaleg.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxinugad/yihm3DA/samsung_health_app_draining_watch_battery.pdfIn PDF document text
    • https://cdn.sqhk.co/minofavazu/gMNjhbV/zomekexokikokasovexeji.pdfIn PDF document text
    • https://cdn.sqhk.co/fakodozug/o1jeif2/veruguvazonab.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/ibpD9ST/how_to_draw_a_simple_ice_cream_truck.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvepiwedo/OhbjhCr/neo_evolution_definition_anthropology.pdfIn PDF document text
    • https://cdn.sqhk.co/xaduwudixum/hdKzVRx/sixoxiwesukagavasezixo.pdfIn PDF document text
    • https://cdn.sqhk.co/pabopimi/KMfSii4/xelolinoximokuxuniso.pdfIn PDF document text
    • https://cdn.sqhk.co/dasewugiru/hc9xHgj/9547035221.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/xhbggKP/cute_avatar_maker_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/bdoicWE/does_the_weather_channel_premium_app_cost_money.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_8bebff64be3b47d59d0caaf8631e8f40.pdf?index=trueIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_ad5eceb41b874c03b60bc547a199115b.pdf?index=trueIn PDF document text
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_11dcccbc610e4d63b44176b06cc60e73.pdf?index=trueIn PDF document text
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_cf49e0faedcb421e8d0e32bdc1dada1f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c168a568-79ca-4397-80b5-3fc53ef71050/how_much_does_a_starbucks_worker_make_an_hour.pdfIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_554f507ed8ea4aedb7dcb5132ab0385e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b771ec0-0a60-4f05-b057-83d74a3225c1/james_baldwin_collected_essays_uk.pdfIn PDF document text
    • http://wijobave.epizy.com/81964308260.pdfIn PDF document text
    • http://denakisewir.epizy.com/twinkle_khanna_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbb60199-f643-42c1-aafa-224399f04554/40889929129.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_off0000fc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC87 5708 bytes
SHA-256: bb2cf8e7bd826d37e0ea82e08b233f2303fa3399c5da9acf3a11ce735cb206f1
font_01_sfnt_off00010fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD2 10872 bytes
SHA-256: 330a339e67da2fe12c3b29761084a156afa09c1abf4e5bcf039ded2c16f0de8d