Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49e27ab263d9655…

MALICIOUS

PDF

90.7 KB Created: 2021-03-09 10:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2843ddc234e4864fbb0997046caf4621 SHA-1: 1bbed65b7606c9dc5cd71653ba20ad75c0cf0ba9 SHA-256: b49e27ab263d96557af155e860e02b73fbd9487231c6097b340ce80844eff460
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 0.9958

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://golowaki.ru/award?keyword=medication+administration+pdf PDF link annotation
    • https://vivorewipaxuje.weebly.com/uploads/1/3/4/3/134365477/ea938d34ca6.pdfIn PDF document text
    • https://rimozaruminipa.weebly.com/uploads/1/3/5/3/135391391/gejixuraropuxafoteno.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/Ribhgen/nafabisome.pdfIn PDF document text
    • https://rusofejez.weebly.com/uploads/1/3/1/8/131856127/3181131.pdfIn PDF document text
    • https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/7761633.pdfIn PDF document text
    • https://verafilutawus.weebly.com/uploads/1/3/4/5/134597792/mofanadosu_mesamam_renemu.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/pjcdfjh/74229050461.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/2w6Ja5m/counter_combat_online_fps_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mowezeto/hgeWjiX/advanced_spectrum_analyzer_pro_ios.pdfIn PDF document text
    • https://degovemidim.weebly.com/uploads/1/3/4/0/134017519/45a92619deeda98.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/ihrgf4B/belujenaribarijegekowekox.pdfIn PDF document text
    • http://vaxuzorokolate.iblogger.org/absa_premiership_fixtures_2019_20.pdfIn PDF document text
    • https://pabedowilopore.weebly.com/uploads/1/3/1/1/131163579/8d951711a0.pdfIn PDF document text
    • https://titezexi.weebly.com/uploads/1/3/4/6/134639754/133957.pdfIn PDF document text
    • https://wozepunelom.weebly.com/uploads/1/3/5/9/135993859/mopokipitowove.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/26519702933.pdfIn PDF document text
    • https://vozupixog.weebly.com/uploads/1/3/4/3/134312338/9138630.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/27026f7c-456b-4514-b566-c095928c52bf/mebuzuxawixitaxulanaka.pdfIn PDF document text
    • http://ratogowadefezes.rf.gd/what_does_miracles_mean_in_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5abba629-977a-4cc6-ade6-b4134529a840/loxamokevuxebuz.pdfIn PDF document text
    • http://lidusikopi.rf.gd/dreambox_oe_2._5.pdfIn PDF document text
    • http://widifusi.myartsonline.com/pevagetos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de64aee2-66ce-48f8-a43b-68ad4a70cb48/sas_survival_handbook_fourth_edition.pdfIn PDF document text
    • http://fawujuvuz.epizy.com/flyers_test_4_reading_and_writing_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77d1223f-f7bb-4b21-8e61-350483701340/how_to_get_textured_wallpaper_off.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3fab47d-60dc-41d7-b288-63026e4f1571/to_shoot_an_elephant_film.pdfIn PDF document text
    • http://pofilagabulero.epizy.com/pufenowojememikanisu.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_off00012516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12516 5276 bytes
SHA-256: 17d7c04c1af54438aca4314e23a90124749f09ba4469539094cdf517ab7ab404
font_01_sfnt_off000136fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136FB 11092 bytes
SHA-256: de065ea76a26f5d76269d3050ae70bc324921fe86e20f432bebdd00e53e3dbf7