Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f1919040b61734…

MALICIOUS

PDF

99.9 KB Created: 2021-02-21 23:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e883687b68a7221e31ea9ab793a955fc SHA-1: 111973c913239f11b02a566f58345a763bb3a98a SHA-256: f9f1919040b6173436db642f6c1bb9c82c929e5614934d2c72ded5a600a1ad0b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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 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://jottigo.ru/strik?utm_term=list+starbucks+menu+philippines+frappuccino PDF link annotation
    • http://tumexade.22web.org/pokhila_assamese_album_songs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380209/normal_5fe59acd46721.pdfIn PDF document text
    • http://lidobexi.22web.org/96405604636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446027/normal_601e585c35695.pdfIn PDF document text
    • https://vitekasawo.weebly.com/uploads/1/3/4/4/134456264/347a89d75cd9.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/iifXjcQ/et_music_player_pro_4pda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424013/normal_6001b721da443.pdfIn PDF document text
    • https://voxipomawo.weebly.com/uploads/1/3/1/3/131379395/fufusufulufisix_bubod_nugirapoji_lugezemubado.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445880/normal_5fcd31f4a478f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5fd344ee4a454.pdfIn PDF document text
    • https://cdn.sqhk.co/nekuripafi/iujNMie/mit_transfer_application_requirements.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/CibiaXj/juventus_news_24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412897/normal_5fe15399d95e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383802/normal_600d70b519f70.pdfIn PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/928089b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409118/normal_60159aa3ea739.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://bizosubage.rf.gd/fimaxawitukipevowuvam.pdfIn PDF document text
    • http://nifiloxoburufi.rf.gd/84351480171.pdfIn PDF document text
    • http://zerekigukazaja.epizy.com/88119144441.pdfIn PDF document text
    • http://zusozokag.epizy.com/66345259551.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF950 5400 bytes
SHA-256: 0cff66d881a854f14d720581cf407c3711958a884f7e3412e1fc06adb830e9b6
font_01_sfnt_off00010b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B87 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off000116e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E3 2876 bytes
SHA-256: ed2ee5b763fb9d405a5878a0832c59a7a42ca847ee711db99a8ab4ded1cd4ce1
font_03_sfnt_off000122b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B3 12412 bytes
SHA-256: 0113603564e661f887903cc104eb0b2e9862ffa147a0090650d030ed79b7bd84
font_04_sfnt_off00014bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BC7 16300 bytes
SHA-256: fb349172d89b0fa2413409f4d6e24f5ac758b5875c0128d1afb6e684716084e4
font_05_sfnt_off00016191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16191 9616 bytes
SHA-256: ce3818c9fca1db7cc8e64a53e8e23887cf1f532f4bbf785b96d587a786bc3c86