Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd782c9b9e80406e…

MALICIOUS

PDF

77.8 KB Created: 2021-04-03 14:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a4ed76ef66e0495c7cc734c503ef1a7a SHA-1: d13ca33065b80030eb7893eb2594c32375d6b1b7 SHA-256: fd782c9b9e80406e707c5af59c20c015f2ce750ea472728d0b350a6bc9dc4eb1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/strik?utm_term=physiology+practical+book+cl+ghai+pdf+free+download PDF link annotation
    • http://hotloveme.online/468414770823j3jn.pdfIn PDF document text
    • https://konizalo.weebly.com/uploads/1/3/5/3/135388679/walebu.pdfIn PDF document text
    • https://fezewemekerod.weebly.com/uploads/1/3/6/0/136050953/dukukefejifedag-luxarosemet.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/jrP2iej/free_slots_machines_online_gratis.pdfIn PDF document text
    • http://arendagg.xyz/vulisazozl1cb.pdfIn PDF document text
    • http://vinnipoh.space/53294730626uvctn.pdfIn PDF document text
    • https://murezujal.weebly.com/uploads/1/3/5/3/135305344/216ef3.pdfIn PDF document text
    • http://pollsexpert.com/3ds_error_code_51099rgp98.pdfIn PDF document text
    • http://optalpha.com/little_red_riding_hood_costume_diy_pinterestvstsb.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/d7lhj39/trash_talking_droids.pdfIn PDF document text
    • https://xunusavijogomos.weebly.com/uploads/1/3/4/7/134702941/4423ddd016f.pdfIn PDF document text
    • http://womenit.space/amc_tv_schedule_west_coast54re5.pdfIn PDF document text
    • https://ladasewesadil.weebly.com/uploads/1/3/4/6/134665294/vixenolubaladukulimu.pdfIn PDF document text
    • http://usmileofficial.site/portable_am_fm_radio_reviewsr18f4.pdfIn PDF document text
    • https://disezoken.weebly.com/uploads/1/3/5/3/135327633/f667ed47.pdfIn PDF document text
    • http://rollernefrit.xyz/609541674716e1i6.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/iXEgjij/15341434376.pdfIn PDF document text
    • https://cdn.sqhk.co/nukuzulu/jqejhig/84866065905.pdfIn PDF document text
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/bcc705e5d803503.pdfIn PDF document text
    • http://leyloften.online/nora_roberts_series_books_in_orderx5wm7.pdfIn PDF document text
    • http://ideaita.fun/maxonosimebufinuvizusina14gec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8b67f35-1478-485d-b440-a310d5e05cab/nuselakukogokutujegipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec85eee1-1305-4dee-9c41-2e4c496d66f7/how_to_repair_brain_nerve_damage.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_off0000f223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF223 5816 bytes
SHA-256: b1159a3d34b81deef8aa8713bb44f43fbebb501993dc3254dfc62821b45cc50e
font_01_sfnt_off00010601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10601 10424 bytes
SHA-256: eb2f73eb7bc79f14d5990cdf6102603db5055f09932298e5ec1e16e9b00eae3d

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