Malicious PDF — malware analysis report

Static analysis result for SHA-256 413c24e54cabeec9…

MALICIOUS

PDF

79.3 KB Created: 2021-03-24 00:25:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b5b3a0472e9afc04a61d881f41241cce SHA-1: 9c5d8117e4062ad2be4aa7a309effd4368c3a77f SHA-256: 413c24e54cabeec9a4453d2555fea70508de16013ca19c220b6803378aa72f5d
194 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a link farm. It contains numerous external links, many pointing to disposable hosting services, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of external URIs and the overall structure strongly indicate a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/award?keyword=grand+central+terminal+map+pdf PDF link annotation
    • https://vakilonote.weebly.com/uploads/1/3/1/3/131382032/6202682.pdfIn PDF document text
    • https://cdn.sqhk.co/fewisezux/Pocicjg/gowowejifalebinudixu.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/jidjcia/clash_of_clans_th10_best_war_attack_strategy.pdfIn PDF document text
    • https://fepapidatimupiv.weebly.com/uploads/1/3/1/4/131437812/sawisifub.pdfIn PDF document text
    • https://sanupeden.weebly.com/uploads/1/3/5/9/135961416/2861688.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/ifggjbL/fiwaduvewodizukigemedi.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/eKEgd88/emirates_skywards_gold_contact_number_dubai.pdfIn PDF document text
    • https://giloxegikejuzun.weebly.com/uploads/1/3/4/7/134712531/patuxukijabipejogufu.pdfIn PDF document text
    • https://kafomepavazepa.weebly.com/uploads/1/3/1/4/131409794/401e524a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_3cfd01b96ce8413f850f3054cd89ac95.pdf?index=trueIn PDF document text
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_fe8f448313dd4dc89f9df2830c92b9f2.pdf?index=trueIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_2d593e08ccfb433ba79aaedf15fcbe5a.pdf?index=trueIn PDF document text
    • http://kelovikaxovixu.epizy.com/sademo.pdfIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_cd7b016686094d458656e5c38fb958c7.pdf?index=trueIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_727c17d27e3c48618555844637bd4a6f.pdf?index=trueIn PDF document text
    • http://roxonolabixatox.epizy.com/xegijaf.pdfIn PDF document text
    • https://50e0a74f-e7a5-4ac3-a7a6-4cdd7b1ad00e.filesusr.com/ugd/8a9d9f_466b93ba275941df848a1f7fbfff9c10.pdf?index=trueIn PDF document text
    • http://fusizizugunu.epizy.com/captain_tsubasa_zero_english_apk.pdfIn PDF document text
    • https://43dda2ad-fadc-418c-a2d5-4b96cca2ed60.filesusr.com/ugd/6eca9c_b99f2c6e18fd42bca18e0e94bec14514.pdf?index=trueIn PDF document text
    • http://jokosalona.epizy.com/kitchenaid_food_processor_attachment_with_commercial_style_dicing_kit.pdfIn PDF document text
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_2dba3f71301143eaa137d6ee18bb9d3f.pdf?index=trueIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_be935cf5fe534aec869910625f5032c6.pdf?index=trueIn PDF document text
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_c0717100e50146358585900a6971ace9.pdf?index=trueIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_9bce7f824f2a4f589d7a3dafc75dd3c6.pdf?index=trueIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_baae0dc8f8914018bb5e7f5a9a94c0e4.pdf?index=trueIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_3dd53a0af435465d968051877a2efc72.pdf?index=trueIn 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_off0000f870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 5156 bytes
SHA-256: f697aa41df5b4dbbab0a53fa3907a57ca7c27eccc4edba33ba4a76ebc313e0e3
font_01_sfnt_off000109ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EA 11064 bytes
SHA-256: 3e2ea9475e03ff41de2d169c26a38a43042501acfc2f06cbb621536e9fbb2a28

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