Malicious PDF — malware analysis report

Static analysis result for SHA-256 326d34d2356d78de…

MALICIOUS

PDF

75.7 KB Created: 2021-03-23 20:38:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8eddd2ef927607edcf9f57a7f226915d SHA-1: 96b781db5723c4060a62e6e06132aecb046463ec SHA-256: 326d34d2356d78de1f48565eacce8c56d0d2d2969179b2d5a77d3cc013244649
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a cloud-document share lure. 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 0.9960

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 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://maypoin.ru/wix?keyword=apkpure+asus+file+manager PDF link annotation
    • https://cdn.sqhk.co/fegujajox/big8WO6/phoenix_zoo_discounts_2019.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/pofilidiniwedefe.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/81347645014.pdfIn PDF document text
    • https://cdn.sqhk.co/dovoxukeni/p1jahen/64891333573.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/sogipek.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/6SPtqjv/onelogin_protect_collin_college.pdfIn PDF document text
    • http://3-bureaureport.info/varaxilugositrdgk.pdfIn PDF document text
    • http://gukopujix.22web.org/handbook_excipientes_farmaceuticos.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/2zG07if/netonotedelipuraxotosuva.pdfIn PDF document text
    • https://cdn.sqhk.co/bupitagalir/Rxzhbij/bus_rush_game_download_for_laptop.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/iLOgeuo/36340535966.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/jump_ball_hop_on_color_block8flz3.pdfIn PDF document text
    • http://varietystore.website/how_to_understand_computer_science456aj.pdfIn PDF document text
    • http://chtotakoeverti.biz/fiwejijef454bj.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/fFpwoSn/doom_eternal_walkthrough_ign.pdfIn PDF document text
    • http://fortysgjdk.fun/rap_reality_tv_showscl7cu.pdfIn PDF document text
    • http://tumuduwaju.mypressonline.com/example_of_rationale_in_research_paper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laxuzakefojo.epizy.com/97038597871.pdfIn PDF document text
    • http://voboxixet.rf.gd/91343077996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c15d1dd-7e67-4322-9ee9-be895ea36259/5519151934.pdfIn PDF document text
    • http://dakofuvijazeti.rf.gd/biological_classification_notes_for_neet.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/vepekomuguwukabobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d6abd4-2a8d-4be5-9f83-696e6e4dd6a2/xotox.pdfIn PDF document text
    • http://monufaro.epizy.com/60931914933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/069eed1f-d824-4986-ae17-10d153883f86/what_are_the_basic_tenets_of_humanistic_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d39a10-9ce5-4c1a-a256-88c61b6b6020/acer_aspire_laptop_power_cord_replacement.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_off0000e19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19F 5272 bytes
SHA-256: cf2fc2c11694116e2733d9a562a47393b4acce23aa38007e144ddbb36d5a66a4
font_01_sfnt_off0000f380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF380 19780 bytes
SHA-256: 77fde7bbfabd21a91a21857c6d4aee89719225706aed53f911bfebefcb58181e