Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d326ccac71f51cc…

MALICIOUS

PDF

80.6 KB Created: 2021-03-15 20:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b01a17af81d24cd503f037f7bdeb8fc3 SHA-1: 21ce1bf079065cb3015ffa8e76c67e7a7b096666 SHA-256: 7d326ccac71f51cc8404e2da93bcda730546231e73cdd0019d2271fb1b2939e2
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://dugedepap.ru/strik?utm_term=how+to+become+a+paramedic+in+memphis+tn PDF link annotation
    • http://xatitakuv.iblogger.org/face_beauty_games.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/yoga_mudras_for_stress_relief.pdfIn PDF document text
    • http://xamawigokoke.mygamesonline.org/kubota_engine_spare_parts.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/sennheiser_rs_175_headphones_australia.pdfIn PDF document text
    • http://zasazigupat.getenjoyment.net/apocrifos_del_antiguo_testamento_tomo_iv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/23f1f3a9-59b4-479a-8621-fdd24f470b59/5956145264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03413a8b-543c-4ac3-8ede-4fd863279a74/govuxexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/609c8f47-9118-46c4-90fb-0e84b5b7a48e/how_to_clean_hoover_elite_rewind_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a4a9377-c3c0-4688-9374-560a686e48a3/osac_mexico_2020_michoacn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78789ab1-7ddc-433e-b75f-04e1b399c5cb/m_audio_axiom_air_25_driver_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/1673066097.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/tigefetukofagisaxoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/mujofotasesem.pdfIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_14846c151bd346c7abf7d3e9949f8171.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/504db123-ac5f-4467-87cd-4993c3d2d587/how_to_download_ghost_of_tsushima_samurai_theme.pdfIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_0cb6a62e40ca4bc0a85d809f0877985c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2393341a-aa8d-4326-92ad-c51f0bbf454f/cuisinart_convection_toaster_oven_air_fryer_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/bangalore_days_songs_free_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac7a5b9a-743a-4d3c-82e6-84ba3cda8916/statistics_for_management_and_economics_keller_free_download.pdfIn PDF document text
    • http://mexexumekevuk.rf.gd/33049935053.pdfIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_9c93217b75f6491f9460889235de7c3a.pdf?index=trueIn PDF document text
    • http://ziwivazud.onlinewebshop.net/what_are_the_responsibilities_of_a_boy_scout_committee_chair.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/duvebegebujivomemexutif.pdfIn PDF document text
    • http://putudodizisag.epizy.com/pefozab.pdfIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_698ac71ca80548df8fc31365203c2ea4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d28dcb8f-1b70-4aa4-a421-d2a745de3aa7/46091631441.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_off0000fbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCA 5476 bytes
SHA-256: 351de3098a4c852db874b541b0386caf07e5f8f86f83cb8448e925a47c2d67a8
font_01_sfnt_off00010e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E40 11440 bytes
SHA-256: ef3ddefd35bc5ff88bd7d3db11f1bdaa031c40fae99632fb21c3c7a1e9d4f310