Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb70d2292313758…

MALICIOUS

PDF

77.7 KB Created: 2021-03-14 03:09:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ecf7edef0a428fdad025cb6d70c39559 SHA-1: 377824ada8a3bbea34eb7bcddd22918b98cb4ea4 SHA-256: dcb70d229231375885afcaa8ca845d22ff318c76502b20eff2813cd39fcf28e1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9989

Heuristics 5

  • 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.
  • 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://midufefew.ru/wix?keyword=comando+especial+serie PDF link annotation
    • http://gajaxujifusokul.mygamesonline.org/how_many_pages_are_in_the_road_by_cormac_mccarthy.pdfIn PDF document text
    • http://autobuff.xyz/moxovisuxezuy4ziy.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/aztec_number_system_converter.pdfIn PDF document text
    • http://re-prime.ru/edifice_casio_watch_price_manilaxoch2.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/venn_diagram_template70bsc.pdfIn PDF document text
    • http://desokore.medianewsonline.com/how_to_use_salicylic_acid_for_psoriasis.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/wayne_dyer_meditation_music.pdfIn PDF document text
    • http://fibutogu.mywebcommunity.org/lasko_tower_fan_remote_control.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/81863257129.pdfIn PDF document text
    • http://sudilufib.getenjoyment.net/volume_of_prism_formula.pdfIn PDF document text
    • https://xuvelufuxilo.weebly.com/uploads/1/3/5/3/135387868/demiko-kajotademur-gukodeveno-gojujazonorake.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/what_is_ethics_in_sport_management.pdfIn PDF document text
    • http://getveran.site/what_is_the_closest_alcohol_to_brandye26mu.pdfIn PDF document text
    • https://rugepokowefi.weebly.com/uploads/1/3/5/2/135294276/6578246.pdfIn PDF document text
    • http://top-shop-store.website/naletuxesefe93m.pdfIn PDF document text
    • https://boxenujevodaziw.weebly.com/uploads/1/3/1/0/131070305/4675340.pdfIn PDF document text
    • http://xutefizil.getenjoyment.net/types_of_meter_in_poetry_and_examples.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://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_846b7a065c8f4f2f8d847ec197bf35ff.pdf?index=trueIn PDF document text
    • https://6997f972-013f-4c6f-ac95-4179ba17a557.filesusr.com/ugd/549e1a_908348c913e34ab3a85d632287302ea6.pdf?index=trueIn PDF document text
    • http://nibubatovavav.atwebpages.com/ritogatekezevuni.pdfIn PDF document text
    • http://xiwozoget.atwebpages.com/jersey_mikes_menu_mikes_way.pdfIn PDF document text
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_ae2615e9129d45fbac8df07f7c805898.pdf?index=trueIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_7cbc438658e4478d833198449cf4ba2e.pdf?index=trueIn PDF document text
    • http://sopexalibip.onlinewebshop.net/fedex_freight_bill_of_lading.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/uke_chord_chart.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE387 4948 bytes
SHA-256: d4e7539d4c44b511f89e485c0ec5b21cfc7028995bc42ef0f763a4ab958694ca
font_01_sfnt_off0000f42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42F 11576 bytes
SHA-256: 5be44727ec032007830f671dea64ab7e4fe5b7bd3140c47b76260dcc804f35b8
font_02_sfnt_off000119db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176