Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ce9c0b38cff21b…

MALICIOUS

PDF

74.6 KB Created: 2021-06-12 22:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 433729e5a586422807ca71f4cf996237 SHA-1: 3ccc9f5dbfddce0d1175422c1e3a80622cfb0738 SHA-256: 05ce9c0b38cff21b6dc3c330346ae44819935ac7ab069b02f7db851a02255858
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 ML classifiers and ClamAV as malicious phishing content. The primary URL, 'https://irlanc.ru/pbw?utm_term=the+dark+knight+watch+online+with+subtitles', suggests a lure to watch a movie online, which is a common tactic for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://irlanc.ru/pbw?utm_term=the+dark+knight+watch+online+with+subtitles PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423460/normal_601b4bb81e820.pdfIn PDF document text
    • https://mibudixu.weebly.com/uploads/1/3/4/4/134490534/24fd5ced7c89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_60b9aad2e773c.pdfIn PDF document text
    • https://dabagurujor.weebly.com/uploads/1/3/4/3/134350609/jasisikapol.pdfIn PDF document text
    • https://fenitejum.weebly.com/uploads/1/3/2/3/132302819/pusixodojaz-lilitoligilupid-somagowugavaz-vebefozebesaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450048/normal_6056b83134b0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://genarozep.pbworks.com/w/file/fetch/144527352/karnofsky_performance_score_0.pdfIn PDF document text
    • http://tereburokofe.pbworks.com/w/file/fetch/144628668/migekazomukebiziduxub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd9c0ca-0547-4dd5-8180-7aae3c511de9/68373036108.pdfIn PDF document text
    • http://dojejezo.pbworks.com/w/file/fetch/145131522/86367008995.pdfIn PDF document text
    • http://lesokulovisu.pbworks.com/w/file/fetch/145194309/70107788621.pdfIn PDF document text
    • http://difusowafid.pbworks.com/f/royal_canin_renal_support_dog_food_feeding_guide.pdfIn PDF document text
    • http://todenulaw.pbworks.com/w/file/fetch/144978063/present_tense_simple_progressive.pdfIn PDF document text
    • http://pesivop.pbworks.com/f/zogobozufavodozizaz.pdfIn PDF document text
    • http://bajupuko.pbworks.com/w/file/fetch/144829521/vidosadavadope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05ba86fd-1fa4-4549-aca6-3f5de1a8ac69/kuvujugapitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7fbc433-72bb-4198-b26f-d5fe6d35031c/pojiru.pdfIn PDF document text
    • http://biwonuv.pbworks.com/w/file/fetch/144467682/can_fortnite_accounts_get_hacked.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_off0000e37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37F 5444 bytes
SHA-256: 90ff9391c13095bd1084e564c2ee52fab00e31957bff6670b2f0a41e85d508fa
font_01_sfnt_off0000f60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60D 10952 bytes
SHA-256: 9d64fdec71653cb2e0f9fc27ca68717699d8ee66699841d41332b92451524036

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