Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5dbea27868106fc…

MALICIOUS

PDF

85.6 KB Created: 2021-03-07 12:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8ff8d4f7a2b42d3075b018c696b3f6c6 SHA-1: 3a78b66ab93172b71cfd465c87f555840cde5d28 SHA-256: a5dbea27868106fcf8ad6848577a7dbf65d8fd4deb2c86cfb0b9ec43338ad04b
186 Risk Score

Malware Insights

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

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 0.9983

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://gimoguvi.ru/aws?utm_term=used+roland+td+30+module+for+sale PDF link annotation
    • https://rudarizegofuk.weebly.com/uploads/1/3/4/3/134355262/0afb4dc.pdfIn PDF document text
    • https://tozisodije.weebly.com/uploads/1/3/4/4/134486105/voritijovipegod_rosegunedodubo.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/how_to_fix_bobbin_problems.pdfIn PDF document text
    • http://copyrightnotice-ig.com/man_in_the_mirror_mp3_download_joyful_noiseesbrk.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/kodolete.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/listening_comprehension_exercises_for_grade_4.pdfIn PDF document text
    • http://storeeuro.info/marlin_60_vs_ruger_10_228ln23.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/BbiMhiW/make_animated_stickers_for_whatsapp_iphone.pdfIn PDF document text
    • https://jirozonuk.weebly.com/uploads/1/3/1/6/131606844/suzijorajolubobe.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/eo0wgfO/wanor.pdfIn PDF document text
    • http://jilavixit.medianewsonline.com/wagipuzikubiposijinedo.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/geguzitadovuwomujoluleduw.pdfIn PDF document text
    • https://xilamebi.weebly.com/uploads/1/3/4/5/134598653/rejed_duwog.pdfIn PDF document text
    • https://cdn.sqhk.co/zivupowixede/giijbuI/neon_pink_women_s_running_shorts.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/nipitekepisojes.pdfIn PDF document text
    • http://allfreebets.ru/lusimudotexb6kp.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/33819866617.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/25731389851.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/3333736.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/aMhcehg/36392791055.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ff06b2c9-6223-4357-b4d5-1bf3807c749f.filesusr.com/ugd/717131_5b2ff04b50304a3ba2249135430d2ed0.pdf?index=trueIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_0582c0e9806146e9b2e683cd7bc74476.pdf?index=trueIn PDF document text
    • http://rixuroruwe.myartsonline.com/robot_coupe_r2_food_processor.pdfIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_3dc09c3dd73946548c67809a179253df.pdf?index=trueIn PDF document text
    • http://kivozusemu.atwebpages.com/janik.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.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A2 5184 bytes
SHA-256: 17b2896d4ee32ea930ec5c717475d949067810ec0f4b62ce03aab83660066f09
font_01_sfnt_off00010417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10417 6636 bytes
SHA-256: 8706b310d8beedada8c588825a302f06e0a82e4cd3789118794881826141da77
font_02_sfnt_off000115b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B0 10528 bytes
SHA-256: a432b26feaacb75e83643a7884811c84410fc82de80b6d15fd6345460c4a5c38
font_03_sfnt_off000139cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139CC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3