Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc23c65e47e9d0a2…

MALICIOUS

PDF

82.4 KB Created: 2021-04-17 23:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4f644dc5112962c971470aefcf7dd006 SHA-1: ca5ad78385dd3832ab0019aa1d244d4b1406bd2b SHA-256: cc23c65e47e9d0a27ccd8249c02a291f92e3700fe63e43ad50d0b949b9c53268
204 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an external URI and an image lure pointing to an SEO redirector, likely intended to lead users to malicious content. The presence of multiple external links suggests a link farm or distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gimoguvi.ru/strik?utm_term=pills+to+get+her+in+the+mood+in+india PDF link annotation
    • https://cdn.sqhk.co/zufutetuwume/bgciiif/jiwajixewijewega.pdfIn PDF document text
    • https://cdn.sqhk.co/waxixojapu/dkpzgeT/boligonarubivijudasoj.pdfIn PDF document text
    • http://dexiwakuxabef.medianewsonline.com/free_bible_esv.pdfIn PDF document text
    • http://parrrtner.xyz/informant_meaning_synonymc94uo.pdfIn PDF document text
    • http://siteznakomstv69.space/how_fast_does_a_polaris_trail_boss_250_go8t43d.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/bitdefender_antivirus_summary_android_basementl2nse.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/pdf_file_of_digital_marketing.pdfIn PDF document text
    • http://fullcreditreport.info/budexidocj0yb.pdfIn PDF document text
    • https://cdn.sqhk.co/jifibipex/BTjfibE/wowumopoxixarerolegexo.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/Fgejg5O/vajumopez.pdfIn PDF document text
    • http://persequenteamsohbet.com/61703958596zymk7.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://620678a0-8f5b-407b-881a-8a96a128c1c4.filesusr.com/ugd/25b7a6_aa7f8008406f40b99782afebc8ea1a0a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/anaconda_navigator_windows_7.pdfIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_c657ca42fee94cb8986f18ef08152bc3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/67441715467.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/government_chief_information_officer_certification.pdfIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_9207ad718c284501a40da1fa6a2ef74a.pdf?index=trueIn PDF document text
    • https://2bb9e989-9ce9-409f-aa8a-839f2ea8d3bf.filesusr.com/ugd/9f8cc2_07fc59d53bf94e27bdbe259e31107ee8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/saxagizajatupun.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/thinking_mathematically_7th_edition_chegg.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/salary_calculation_in_excel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F5 5028 bytes
SHA-256: e8e88db2478902b43e9dc00c414730397313d77a4cabfa8fba4ba62f42e8284c
font_01_sfnt_off000109c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C7 10660 bytes
SHA-256: 88bdeac822b815b65bf15cab2e54ffdef4aa933890e922e48a82783bcfb6a730
font_02_sfnt_off00012dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176