Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47b305c78463ac0…

MALICIOUS

PDF

81.3 KB Created: 2021-03-17 19:28:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5d06466210c2173475bd15fd0d4a3a45 SHA-1: 206d284aeeedfa06bf0cba5e2702104d0fb84b25 SHA-256: a47b305c78463ac0fcc08ecd740174801cd18520df7e454f20fe63d2f87302cd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by heuristics as a link farm and a potential phishing/malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/award?keyword=opencv+c+tutorial+pdf PDF link annotation
    • http://niwifara.22web.org/a-_ha_stay_on_these_roads_album.pdfIn PDF document text
    • http://lagejarejitog.mypressonline.com/14912359995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465267/normal_601580486ac88.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/coroners_act_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5ff16bcc957a0.pdfIn PDF document text
    • http://dokojusekorukuf.iblogger.org/how_to_get_fox_sports_midwest_on_dish_network.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414494/normal_602f1a75e9cce.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/62644825291.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/a4aa6d3a-4d8a-421c-8b0a-cca74c114b65/does_dunkin_donuts_have_gift_cards.pdfIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_30ff2d73ba944970b3b6ac17594fcd6d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/53a4fdc0-c71b-4824-bea8-d775d411b3dc/vakovixulasulemelodim.pdfIn PDF document text
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_d8e828572f3b42779ecf56c02ebcc909.pdf?index=trueIn PDF document text
    • http://ganakakene.epizy.com/netifadavis.pdfIn PDF document text
    • http://safipalibeso.rf.gd/managed_services_business_plan_template.pdfIn PDF document text
    • http://zekubegem.epizy.com/zukelaxebuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b6aeb59-5525-4a6c-9eb4-a3738cd83542/pafosusutete.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/does_tegrity_record_your_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef5fefb-febd-47f2-8dc0-2f7734dc2825/best_games_2020_pc_download.pdfIn PDF document text
    • http://gigegikotufevex.rf.gd/google_spreadsheets_concatenate_strings.pdfIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_fbb5e5899d614509bf842d354f45bcc8.pdf?index=trueIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_2e3b7b61b43044da8a50d1ced3b94d8b.pdf?index=trueIn PDF document text
    • http://zifawikixeliba.epizy.com/43346069273.pdfIn PDF document text
    • http://vujipopeb.rf.gd/18684526632.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_off0001021b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021B 5060 bytes
SHA-256: d5f167f2a1428b6ee74b2e49d0dd0c921821bc9e0418f5b0d53f2d07cfde3c48
font_01_sfnt_off00011366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11366 10692 bytes
SHA-256: 39bd299d584e5ec5e665379341e1f34f120d1a2cadc4fb42c14ac02a7de60e01

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