Malicious PDF — malware analysis report

Static analysis result for SHA-256 81a1bc6288772d3f…

MALICIOUS

PDF

68.2 KB Created: 2021-02-18 08:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 19962cc7d355e92fbc6dffd0f3d6ea3e SHA-1: 2f5156d3d77601f09516aa713777be6ae64a612d SHA-256: 81a1bc6288772d3fc6e0ad944dbe5b38e72bb56a5df81a8211857606fa32bc9a
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://jottigo.ru/wix?keyword=ge+microwave+jvm6175skss+manual PDF link annotation
    • https://cdn.sqhk.co/wazilisiko/jdjgSjb/suxagukomalezumupitajoxug.pdfIn PDF document text
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/musawumokagu-jeketimulim-xiribivuzepe-kuxovixa.pdfIn PDF document text
    • https://xikunozazoteta.weebly.com/uploads/1/3/1/4/131453294/bajema.pdfIn PDF document text
    • http://ueuniti.xyz/more_genetics_practice_problems_answers9le6t.pdfIn PDF document text
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/kopaluburi.pdfIn PDF document text
    • http://extraterrestrials.space/abide_verb_forms_in_englishjbryq.pdfIn PDF document text
    • https://zotadapavera.weebly.com/uploads/1/3/4/4/134483721/sejesek_lixuvuxasubu_woxom.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/iijd9P5/car_mechanic_simulator_2020_date_de_sortie.pdfIn PDF document text
    • http://santaparker.store/8506983599tdcr6.pdfIn PDF document text
    • https://cdn.sqhk.co/wovupeni/jhdgiii/apocalypse_city_map.pdfIn PDF document text
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/8ca3d5.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/8aJKhiq/dice_king_song.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/IyherkP/kawusananuporugabisevogu.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/aghf7gf/twisted_root_burger_co.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/hcihVUb/63561936438.pdfIn PDF document text
    • http://albatros-trans.ru/70786184029l0jhq.pdfIn PDF document text
    • https://cdn.sqhk.co/gegojagakexu/Hihhfhb/58158390680.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zimemotom.rf.gd/bbc_iplayer_error_code_5.pdfIn PDF document text
    • http://repuvamiperubo.epizy.com/19523313472.pdfIn PDF document text
    • http://toguzojokes.epizy.com/lubosenajebedafawusubo.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_off0000cdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAC 5680 bytes
SHA-256: a558c18fc2c9bc60f95d98d8db6ae8d5ef7c3729f87209784ba3ee2973b38553
font_01_sfnt_off0000e11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11C 10092 bytes
SHA-256: 3cc0e36d3054ebe9737174d58a87dc9d6e44b6487bc128b3d6cd0b5af106b338

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