Malicious PDF — malware analysis report

Static analysis result for SHA-256 7703a038d0bc143d…

MALICIOUS

PDF

72.1 KB Created: 2021-02-28 05:37:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4a2f6be5b7dc13e123176adc920210cc SHA-1: 3b7d4653ad3abea3555f9b2bba5f4371317cf8e6 SHA-256: 7703a038d0bc143d81ffb6c00691b79a47145adbb5c1de076739c2474592578a
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that redirect to suspicious domains, masquerading as a search result for checking a Starbucks gift card balance. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests an attempt to lead the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=how+do+i+check+the+balance+on+my+starbucks+gift+card+in+canada PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4461751/normal_5fec01199c2d8.pdfIn PDF document text
    • http://natur-green.fun/tadogaxolagurofogkfs4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_601fcea6ad934.pdfIn PDF document text
    • https://cdn.sqhk.co/zupisopad/JhawTha/63827847636.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376380/normal_5fc70216c9921.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/gjNeIid/gunship_strike_3d_apk_mod_revdl.pdfIn PDF document text
    • http://kvrovk.xyz/335241199899amzr.pdfIn PDF document text
    • http://tufataf.22web.org/brooklyn_2015_movie.pdfIn PDF document text
    • http://show-visitor.xyz/54563597200b2lu2.pdfIn PDF document text
    • http://morj.space/lenovo_t430_laptop_specifications0uhqo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_602053a1a4fff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469640/normal_60173a9b82458.pdfIn PDF document text
    • https://cdn.sqhk.co/dapalufited/1GIje0I/diy_woodworking_projects.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455890/normal_602aae8fd60ac.pdfIn PDF document text
    • https://cdn.sqhk.co/xurinuwame/gggd9ge/64594480129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5fd648bab70a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497078/normal_6011aa6847c31.pdfIn PDF document text
    • http://lg-copyright.com/daluke4jpom.pdfIn PDF document text
    • http://ledimpress.biz/71245883076fwbsg.pdfIn PDF document text
    • http://vasazuruxu.iblogger.org/sound_of_silence_disturbed_clarinet_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426832/normal_5fc9190b6ef8a.pdfIn PDF document text
    • http://vexasemigema.iblogger.org/anthya_bhangi_song.pdfIn PDF document text
    • http://f1l3download.site/wedipakudexavatibog57uzx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rilevoka.rf.gd/sesudugefokagom.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_off0000d97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97A 5796 bytes
SHA-256: cc87f945431574e4bb4c2b2b2db7dd935b58afba4671c90c9da9654e3069878d
font_01_sfnt_off0000ed1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 11904 bytes
SHA-256: 32c0636b8599e6c0021c54f12c91d42430d956d89b972daea22d36ee44823d86

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