Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09f0e93acfe4eee…

MALICIOUS

PDF

80.0 KB Created: 2021-03-18 06:39:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 144f08e9b22776adf8a099ac8ba21a23 SHA-1: 50c9affbe557d1e8eeb25b069a0bcf256e29b21b SHA-256: c09f0e93acfe4eeee5b948aea981ac14251e4584a509e966eef5c4a3ca57f815
186 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, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The primary URL, 'https://dugedepap.ru/award?keyword=relationship+between+verbal+and+non+verbal+communication+pdf', is likely part of this scheme to drive traffic or distribute further malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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.
  • 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://dugedepap.ru/award?keyword=relationship+between+verbal+and+non+verbal+communication+pdf PDF link annotation
    • https://sepiximefajo.weebly.com/uploads/1/3/4/8/134849953/lasupo-bovilewevekiri-noxapazipuw.pdfIn PDF document text
    • https://jumirusuvowelu.weebly.com/uploads/1/3/4/6/134632856/614d9.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/a4ggshe/frontline_commando_2_game_play_online.pdfIn PDF document text
    • https://jabuzowe.weebly.com/uploads/1/3/4/3/134312688/pedanarofofexemi.pdfIn PDF document text
    • http://avtoshkola-region26.ru/netgear_prosafe_plus_gs108e_8-ports_switchzcg1s.pdfIn PDF document text
    • https://galofufe.weebly.com/uploads/1/3/1/3/131384583/2115120.pdfIn PDF document text
    • http://thestablestl.com/fagor_pressure_cooking_recipes34ujp.pdfIn PDF document text
    • https://kuginipa.weebly.com/uploads/1/3/4/8/134853520/pofekewuzer_firaz.pdfIn PDF document text
    • https://zedifetizigofup.weebly.com/uploads/1/3/5/3/135393349/9b5edea0933e6e1.pdfIn PDF document text
    • https://cdn.sqhk.co/mofipife/iiahbgh/mx_player_apk_download.pdfIn PDF document text
    • https://xiligori.weebly.com/uploads/1/3/1/4/131411896/jevemokame.pdfIn PDF document text
    • https://wuvobarapupi.weebly.com/uploads/1/3/0/8/130813490/tokom.pdfIn PDF document text
    • https://patakobenidirok.weebly.com/uploads/1/3/0/7/130775678/velid_mituxerevakeva_mesil.pdfIn PDF document text
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/7962886.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/MVibM7W/mcd_number_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/cgiA8IR/likatusamaxiv.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/fhcZjdS/i_am_a_warrior_lyrics_patty_smyth.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://da4cb982-96ac-4827-b01c-1601b1c9977c.filesusr.com/ugd/b05c40_2f88642f69e248a9bc18d45bf51fce06.pdf?index=trueIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_f4798cdd51694b88bbce2f4eefe563aa.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_74cf3448520b4ed7b5f7eae783d90772.pdf?index=trueIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_5a1fba611a9b4dd9bc482ea3ed19cd6e.pdf?index=trueIn PDF document text
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_e25a1fc34ca447dc8abe8c42846ce182.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 5576 bytes
SHA-256: 118daf25a3dfcf259e44d5bbd1417dbba3d9ab563d67a70ba6c94c1b40f8af55
font_01_sfnt_off0000ffe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE2 10544 bytes
SHA-256: b86320d4634eab7c41182f8677d8addffaa669ab31faf641d26a0c1aeab46468
font_02_sfnt_off00012408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12408 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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