Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b783eec73ccbeb…

MALICIOUS

PDF

82.9 KB Created: 2021-03-09 11:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-06
MD5: 238b320010e5a0dfb9ddb5634383e9a3 SHA-1: 30b605aa1309b2662aac31ab825e15d6acf99dbc SHA-256: a8b783eec73ccbeb25ba3fc3ef24714c789eecc7ac155e2c359446603846a10a
246 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Viral-video clickbait PDF links to suspicious host critical SE_VIRAL_VIDEO_CLICKBAIT_LINK
    Document uses viral/leaked-video lure text and links to a suspicious disposable-looking web host. This is a clickbait/traffic-scam carrier shape rather than a benign PDF link.
  • 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://bologen.ru/123?utm_term=distance+time+graph+worksheet+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380072/normal_6040f085d2cc2.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/jebapocmzsy.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/what_causes_a_honeywell_thermostat_to_go_blank.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377663/normal_6005ba1d4e64a.pdfIn PDF document text
    • https://dejifokafabowek.weebly.com/uploads/1/3/0/7/130739182/pevasufaruzag-rudiwuwalu.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/request_for_british_passport_application_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373987/normal_603e514f75f6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_603b0d8275872.pdfIn PDF document text
    • http://komarovskii.xyz/90239410927kju2x.pdfIn PDF document text
    • https://nupepapuk.weebly.com/uploads/1/3/1/4/131484133/3bc2228ab844a.pdfIn PDF document text
    • http://urott-hu.com/teditifegalezifikizexot3u3h5.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/acropetal_technologies_limited_annual_report.pdfIn PDF document text
    • https://zulozagadome.weebly.com/uploads/1/3/4/3/134318764/vavijenole-jutuzu-zajopa-kujajolediligof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_5fe964b8ccb11.pdfIn PDF document text
    • http://jalopava.22web.org/arikil_pathiye_mashup_video_song.pdfIn PDF document text
    • http://axecheat9.xyz/audi_s4_b6_avant_for_saleko8pr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_602b51a7e7e4b.pdfIn PDF document text
    • https://sevisexabokiro.weebly.com/uploads/1/3/1/6/131637038/bozib.pdfIn PDF document text
    • http://bostpolamos.site/46245910137b2g8x.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000f04a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000f04a.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00013028.bin)
    • http://siboxep.epizy.com/46319833749.pdfIn PDF document text
    • http://bipulusesag.epizy.com/chicken_soup_for_the_soul_dog_food_ingredients.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 extracted file (font_00_sfnt_off0000f04a.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04A 5360 bytes
SHA-256: 1c428050c06a526b10f056fedb8a8dd3000cb1ca5a8220e07668661023216a0d
font_01_sfnt_off0001025e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 14572 bytes
SHA-256: b0a79114f7a33f8223e71071f9fd4f8e1cd61e2c83659f8d7f1ad08a87e9ddde
font_02_sfnt_off00013028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13028 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333