Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1c5aa6e0e4fa4e…

MALICIOUS

PDF

81.2 KB Created: 2021-03-25 06:01:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7e4879d8115bcaf5094941508311ede1 SHA-1: e027829b939a786bd2865eae8839828ffb83c16d SHA-256: fe1c5aa6e0e4fa4e96715622a063cd8135f3e010c127154a07f3396076a0f92b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the presence of numerous external URLs and the heuristic firings point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://botokaw.ru/123?utm_term=aleister+crowley+777+pdf PDF link annotation
    • https://cdn.sqhk.co/tabuguran/Nx2dGhb/gutezerujasetorojarojud.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/washington_state_covid_vaccine_news.pdfIn PDF document text
    • http://potuduwatolebu.mywebcommunity.org/rufafegonirilorujo.pdfIn PDF document text
    • https://vefonero.weebly.com/uploads/1/3/1/0/131070196/11ff2bee.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/ghicBf8/outlaws_sprint_car_racing_2019_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nitagalut/WigicTB/epic_astro_story_apk_mod.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/cygolite_hotshot_pro_150_usb_rechargeable_tail_lights.pdfIn PDF document text
    • https://lubavezutumeji.weebly.com/uploads/1/3/4/7/134757539/8957660.pdfIn PDF document text
    • https://burigazipe.weebly.com/uploads/1/3/4/7/134764527/bavazevomerija_xuzuzufil_gusobodudaxazem_gemufebowib.pdfIn PDF document text
    • https://cdn.sqhk.co/rovukupovumo/Njhdric/game_true_football_2_mod.pdfIn PDF document text
    • https://ferizovewop.weebly.com/uploads/1/3/4/8/134887996/ralanavalime_kovagorafulupu_lojiguxatewebu_bazidoraxojujuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gitipelut/vunarugubevamatonirituwup.pdfIn PDF document text
    • https://51364a6b-283d-4537-b9df-48522fd8faf2.filesusr.com/ugd/921180_aa7473664ac3415c8ca28e87489fd1aa.pdf?index=trueIn PDF document text
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_ab1fb86e39244e538d80e8c7dd15dae6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/lolafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f0c138a-b351-4198-9da5-ad99c7183b3d/zujipomiwuxujuralonixepev.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/brotherhood_of_steel_fallout_4_guide.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_13702090d6604f1faf91ef2796ae6188.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/lagu_ponytail_to_shushu.pdfIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_adc82744253c4adb9f345a6768177d92.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13c0bed-9ca4-45bc-9c74-22443575aae4/mosetejakulotabiziruz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE821 5204 bytes
SHA-256: 248e9b01f6bacf3998eb37a2fb750e5f3931f97b361d43730037d2f21466e66d
font_01_sfnt_off0000fa0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0B 11984 bytes
SHA-256: 893aeec463eeeabeab801eff98aef6efdf277d5779d2c2098327f1d96f26be02
font_02_sfnt_off00012279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12279 16088 bytes
SHA-256: ccd0ea095085b9379100d4de0d13d045157d8501f46cd3db2ef5c00475687e02

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