Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd74b6c92bd43f7d…

MALICIOUS

PDF

93.3 KB Created: 2021-03-18 08:27:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8304c22014e351abda9e2e343c01076f SHA-1: 5a3967e98fa2b90d84df51845377edf31a6f4c96 SHA-256: bd74b6c92bd43f7dbb1852ea55256f0286156fe33fe8a8824224d48a386e8fd7
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://crophysi.ru/wix?keyword=ovf+vs+ova+vmware PDF link annotation
    • https://fiwarurebel.weebly.com/uploads/1/3/2/8/132814972/6561387.pdfIn PDF document text
    • https://mejibafizafev.weebly.com/uploads/1/3/4/0/134042836/9e470154da0a3.pdfIn PDF document text
    • https://mozesejute.weebly.com/uploads/1/3/1/3/131380505/muloxiza-piwosodo-debonuxi-novuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495385/normal_601fb4bb04217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_602c88e11cd8a.pdfIn PDF document text
    • https://zepukuliro.weebly.com/uploads/1/3/5/9/135964459/pajivepeb.pdfIn PDF document text
    • https://ditoxinenibon.weebly.com/uploads/1/3/4/3/134324582/vepetiretume_newino_vaxitotisegugo_fekik.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/candle_in_the_wind_1997_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366325/normal_5fc9c2e9ea641.pdfIn PDF document text
    • https://zudejuzire.weebly.com/uploads/1/3/2/6/132681250/307ac80bfc5a08.pdfIn PDF document text
    • https://voxivunesiru.weebly.com/uploads/1/3/1/4/131407918/2235305.pdfIn PDF document text
    • https://favujoki.weebly.com/uploads/1/3/5/3/135302790/guveni_xalunanowa_tanexowoni_bidepazibekig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421937/normal_6024460ae5cd0.pdfIn PDF document text
    • https://rawuwivusezorom.weebly.com/uploads/1/3/1/4/131406564/5017627.pdfIn PDF document text
    • http://maxapur.22web.org/cumulative_frequency_graph_worksheet.pdfIn PDF document text
    • https://furikokazi.weebly.com/uploads/1/3/5/3/135399827/7567997.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/city_of_fallen_angels_audiobook_vk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5fcc51c4ea1dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8c6baf99-6c0e-4810-a28f-51b497dcdf95/mosutupofomekoxizimaxediw.pdfIn PDF document text
    • http://xewenometan.epizy.com/gypsy_woman_aadhi_guitar_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55709204-833b-4954-a9d9-9e7cf127bc74/eton_field_radio_reviews.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/97028106792.pdfIn PDF document text
    • http://kidereludabiron.epizy.com/excel_estimating_spreadsheet_templates.pdfIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/how_to_install_a_broan_ventilation_fan_with_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738729d6-2f27-467d-8c2d-fec319a450ea/why_does_my_tv_have_no_sound_or_picture.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2F 16284 bytes
SHA-256: 045dc7c421abc9dbd808e57149ed59e70d0c0f92aa009eb926dd32244e65dfef
font_01_sfnt_off00012156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12156 4616 bytes
SHA-256: b896079ca6b014a591daa5e38f7b3e374e51b286aa6cd0614d5deca9be8a7d32
font_02_sfnt_off0001310f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310F 11816 bytes
SHA-256: 339d42475bca4803eb568f9ebfa31eb6bc7de5c8ca769482990b31bd37444e06
font_03_sfnt_off000157bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157BF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3