Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4aec9e40436ec83…

MALICIOUS

PDF

72.8 KB Created: 2021-01-23 10:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 75fb3714b7c1b710154292f35de5a57b SHA-1: 64289578ead931e23479b4b2053151ea1f6ecce3 SHA-256: d4aec9e40436ec83324584b43d4d1134f222b91288c288c98fe019d667bf0f6c
186 Risk Score

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://baarspo.ru/aws?utm_term=villain+new+bengali+movie+songs PDF link annotation
    • https://sagakoto.weebly.com/uploads/1/3/0/8/130814189/a2eee7741f5925.pdfIn PDF document text
    • https://nalovitifa.weebly.com/uploads/1/3/4/6/134600698/dokinalesamifasiv.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/aDZjdhi/gisadirekiw.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/geSjih4/94551023073.pdfIn PDF document text
    • https://cdn.sqhk.co/kupovite/smgiphd/gevogisewuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464068/normal_5fd324fcc45c9.pdfIn PDF document text
    • https://site-1176955.mozfiles.com/files/1176955/37580319580.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477408/normal_5fee6366bfe9a.pdfIn PDF document text
    • https://cdn.sqhk.co/rigidaluta/h9tf02b/online_business_ideas_2020_philippines.pdfIn PDF document text
    • https://dofikusoru.weebly.com/uploads/1/3/4/4/134472045/banofuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454681/normal_600baaf98769f.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/hjifNjc/tiny_worlds_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/Uidiidu/18593014090.pdfIn PDF document text
    • https://site-1173433.mozfiles.com/files/1173433/psychology_somatoform_disorders_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/thdTLje/war_dragons_atlas_castle_finder.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/bhhiaEx/classic_space_invaders_table.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/ijc8hd8/bujizuzovowe.pdfIn PDF document text
    • https://site-1168046.mozfiles.com/files/1168046/85593817631.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE15 5168 bytes
SHA-256: d6f73995e088babe75c9f72eccd22ed1cbd672d477b1c2af7334737194bc10db
font_01_sfnt_off0000efb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB7 11384 bytes
SHA-256: 9075a6a15014bd1844bd7b7c89538014c10a024b4d60e49251d81ed19854906c

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