Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c17506b2abb6ab3…

MALICIOUS

PDF

74.6 KB Created: 2021-06-14 18:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5bb6e1605dfaa257cb5e22997449aeec SHA-1: 410cddf2c24abfb94f6f60377988f96276802ae8 SHA-256: 1c17506b2abb6ab399b12d3128a00ea64b61de71c5261555034f93ab138cbe23
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to obscure malicious destinations. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate this behavior, with URLs like 'https://wastran.ru/pbw?utm_term=frontline+commando+d+day+hack+download' serving as lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://wastran.ru/pbw?utm_term=frontline+commando+d+day+hack+download PDF link annotation
    • https://telabafulux.weebly.com/uploads/1/3/0/9/130969700/xevipodisodamaj.pdfIn PDF document text
    • https://bemaxeviliw.weebly.com/uploads/1/3/4/4/134482954/jotewema-tarufe-xebefidedudalef-rufen.pdfIn PDF document text
    • https://vavixama.weebly.com/uploads/1/3/4/4/134471840/nififaxak_wuwakotig_tofegosis_budagoju.pdfIn PDF document text
    • https://detazemunowovi.weebly.com/uploads/1/3/4/7/134704720/83ac431.pdfIn PDF document text
    • https://wigobozigor.weebly.com/uploads/1/3/5/3/135345973/c5534ef45600707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384482/normal_60519f76df17a.pdfIn PDF document text
    • https://defaxudenuged.weebly.com/uploads/1/3/5/2/135293647/8237415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527042/normal_601f295a9d4d1.pdfIn PDF document text
    • https://kibivatefa.weebly.com/uploads/1/3/4/2/134266698/sajekel.pdfIn PDF document text
    • https://pasuliwipo.weebly.com/uploads/1/3/1/4/131452824/2376340.pdfIn PDF document text
    • https://pobowapikojuga.weebly.com/uploads/1/3/4/9/134903403/1853284.pdfIn PDF document text
    • https://fomikozifu.weebly.com/uploads/1/3/4/5/134511133/winabusububo-gemib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_5fd68bef4a581.pdfIn PDF document text
    • https://vawuwoteb.weebly.com/uploads/1/3/0/9/130969488/butor.pdfIn PDF document text
    • https://dexisuliraj.weebly.com/uploads/1/3/5/3/135346252/mapunot_jozadudepi.pdfIn PDF document text
    • https://foxakiletomuxo.weebly.com/uploads/1/3/4/0/134012751/d5da8e80a387d0.pdfIn PDF document text
    • https://vogexuweju.weebly.com/uploads/1/3/0/9/130969932/6462049.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a3fe78-b469-48e3-b9d4-69f166ce56f3/glock_19_gen_5_leather_iwb_holster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb64e860-56db-4f07-8ede-a1460a62f588/tera_chehra_jab_nazar_aaye_adnan_sami_lyrics_hindi.pdfIn PDF document text
    • http://winubuton.pbworks.com/f/applied_financial_macroeconomics_and_investment_strategy.pdfIn PDF document text
    • http://javefanudosa.pbworks.com/w/file/fetch/145017474/lukibewito.pdfIn PDF document text
    • http://vugufosenene.pbworks.com/w/file/fetch/145282029/aris_linux_launcher_mod_apk.pdfIn PDF document text
    • http://gakuwibed.pbworks.com/w/file/fetch/144841203/35345773508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85cab78-8988-4b82-a00e-2d4f0247c60d/triangle_congruence_proofs_geometry_worksheet.pdfIn PDF document text
    • http://runaliguredu.pbworks.com/w/file/fetch/144474669/20183001631.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_off0000e626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE626 5216 bytes
SHA-256: 7fcc2cdc638ab83a52f151eeb2f4c3c607affcf3e42ae87c5fafe24881a1a78f
font_01_sfnt_off0000f7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CA 10732 bytes
SHA-256: 74e5fedc3bf5311f3040cca7520264f7b23577da266ad263acd92a7fd49366f4