Malicious PDF — malware analysis report

Static analysis result for SHA-256 b81ab2973f712627…

MALICIOUS

PDF

75.5 KB Created: 2021-03-14 01:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: eefe33dc214da58ffa603104ffe8f881 SHA-1: b1124ed88d2da0a6b920b8fb106e9fa1bd0c26e5 SHA-256: b81ab2973f71262716482f019f14d4e30a6fa4319e3c2654f0887066ddb0eed5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious lure related to a search query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=how+to+turn+on+dremel+3000 PDF link annotation
    • http://suvuxivenorum.mypressonline.com/is_freeman_guerrilla_warfare_good.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389823/normal_5fe3580df39ce.pdfIn PDF document text
    • http://morpeoplelife.ru/nokevotizirisepakopuwo5c793.pdfIn PDF document text
    • http://creamwalls.online/1596665861qbs4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453719/normal_60346b3d6b232.pdfIn PDF document text
    • http://price-list.moscow/bebotubirubetisisevpaq2m.pdfIn PDF document text
    • http://pink-echo.club/new_whatsapp_status_romantic_songdcin2.pdfIn PDF document text
    • http://xepuxesadara.mypressonline.com/86284851765.pdfIn PDF document text
    • http://unlockdeals.shop/zinikuxemaxoxil2mfxp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/2017_cbr1000rr_sp_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3e8df50-4510-4748-866f-10ef1e8db515/military_improvised_munitions_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/syncope_guidelines_2019.pdfIn PDF document text
    • http://mizixizomafupez.epizy.com/adhesive_laminate_sheets_for_cabinets_singapore.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/2752930429.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/microsoft_project_2013_for_mac_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d3efd9a-83a6-4a34-8467-e48d28756d18/finutufud.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/acoustica_mixcraft_5.pdfIn PDF document text
    • http://felugibesixe.onlinewebshop.net/23713684871.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/pathfinder_player_companion_ranged_tactics_toolbox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09b3489-0937-4aed-a6d7-9b850d7fd1b6/gusutuzonumududamag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759fefba-4a3d-4e3c-8779-38fe8ccc251b/85634461106.pdfIn PDF document text
    • http://xolazituvote.epizy.com/curriculum_vitae_formato_para_llenar.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB9 4940 bytes
SHA-256: 74c2e5744d7a28eb668de146bf402a1231dfa82a6443cb779618a61672a69a62
font_01_sfnt_off0000fc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC82 10604 bytes
SHA-256: db99ac35693e9b2dfb9f3679e6c9d9b7ec88122c8ccafd97cee4d9ea74047c66

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