Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c877676e117532…

MALICIOUS

PDF

78.2 KB Created: 2021-04-03 22:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 269e3cb091d1da4fedccce0cf4cbab15 SHA-1: 18d698455988baf88f1503270e15357035344723 SHA-256: e8c877676e117532886dc88bf30e52e1417c1bf5844d7c48491200cb56706ae0
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 0.9961

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://soxebez.ru/strik?utm_term=how+to+tell+if+pilot+light+is+lit+on+hot+water+heater PDF link annotation
    • http://how2clever.com/75275040871fwkdf.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/iaCgcBK/real_speed_car_racing_mod_apk_android_1.pdfIn PDF document text
    • https://vezitiratad.weebly.com/uploads/1/3/1/8/131856143/podifa-zuzavut-vojadu-keletafi.pdfIn PDF document text
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/1877557.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/3178893.pdfIn PDF document text
    • http://natur-bio.space/galadoviniccbvv.pdfIn PDF document text
    • https://dupomogorudo.weebly.com/uploads/1/3/4/5/134595760/bb616e82bdddd4.pdfIn PDF document text
    • https://lurotafimeka.weebly.com/uploads/1/3/0/7/130740015/56a0d29e78262.pdfIn PDF document text
    • https://devarewiwigunum.weebly.com/uploads/1/3/2/7/132710712/migevikemitokin.pdfIn PDF document text
    • http://pro-konditer.com/anuraga_karikkin_vellam_songs_video48nu4.pdfIn PDF document text
    • https://cdn.sqhk.co/minofavazu/iiePwjg/15633964941.pdfIn PDF document text
    • http://shtancircul.site/janam_janam_ka_saath_hai_mp3_free_dong650.pdfIn PDF document text
    • https://kogekotosejikol.weebly.com/uploads/1/3/5/4/135400664/6974350.pdfIn PDF document text
    • https://vewisegi.weebly.com/uploads/1/3/4/4/134434396/11d2919f82.pdfIn PDF document text
    • https://xazowivuxef.weebly.com/uploads/1/3/4/5/134513065/8612901.pdfIn PDF document text
    • https://cdn.sqhk.co/kekagate/MYhehbk/namahana_street_honolulu_hi.pdfIn PDF document text
    • https://kimakinogi.weebly.com/uploads/1/3/0/7/130775446/7961394.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/leteraxewe/23188886903.pdfIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_802a02770d904decb8175d1b59836a07.pdf?index=trueIn PDF document text
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_9512bacdb6b14865a2cf4302429019cd.pdf?index=trueIn PDF document text
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_8eea0a23b5ca4160ab94d55baa96aef0.pdf?index=trueIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_38813c08b39f4f208104b7c1656c4d49.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/what_transmitters_are_compatible_with_spektrum_receivers.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/plexus_biocleanse_info_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/10474593553.pdfIn PDF document text
    • https://e5eb2fa1-7429-4bdd-9f06-aebe1c13fe5a.filesusr.com/ugd/607883_a9cd5edd92a5422caa1a6eb3d1178bf9.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BD 5216 bytes
SHA-256: 8fa5084210bc7105a8948df7279a326ff1fda1d75b05f003ed90b864dbecb8d3
font_01_sfnt_off0001058e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058E 10812 bytes
SHA-256: 95b15a872c63250f975a5020d8e463a593b77a6568226176e7083389c32e4302