Malicious PDF — malware analysis report

Static analysis result for SHA-256 a109b9680252e560…

MALICIOUS

PDF

72.3 KB Created: 2021-02-22 03:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 96e4d57e14b4d9a56d155a3df6e1951c SHA-1: ffc6ea80c650357257c2faa2fd4b877153521269 SHA-256: a109b9680252e560a6f0e05bfca4afef8ac6da059100da1807cc934fd5289618
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/wix?keyword=high+school+story+apk+hack In PDF document text
    • http://biomanix.best/infieles_chv_sin_censura_online_jobsopwdu.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/jdjcP2j/missing_411_hunters_documentary.pdfIn PDF document text
    • https://cdn.sqhk.co/lupekute/jmijOuK/26663457781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371010/normal_603050d87e213.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/UBYggua/jokojimupinupobogexufap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427086/normal_602a7b84ed0f0.pdfIn PDF document text
    • https://vidujari.weebly.com/uploads/1/3/4/8/134858315/959783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462354/normal_601dc91c7af19.pdfIn PDF document text
    • http://converstarget.ru/506581145116boy0.pdfIn PDF document text
    • https://cdn.sqhk.co/zanuvajebodu/cjfBjag/xtreme_drift_2_apk_para_hilesi_indir.pdfIn PDF document text
    • http://vittorguxx.site/82858150036nnzy1.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/hWibZhh/58406193217.pdfIn PDF document text
    • http://dithetsen.xyz/710548667079mwlm.pdfIn PDF document text
    • https://cdn.sqhk.co/xupumekejaxa/RTjfiak/polysphere_bts_puzzle_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/21441815451.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/lawn_care_business_pricing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/3636476971.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/47542496714.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_off0000dd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8E 5324 bytes
SHA-256: e9167dd41a30ec5d02e577d5f2c58e191c84456e517b6e4b0c894947997a3def
font_01_sfnt_off0000efb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB6 10808 bytes
SHA-256: a823a3ee082ef714da4c68faa48ba916537e767821740db9be912bf8ef4127cc

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