Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64bebea36a8e6b6…

MALICIOUS

PDF

77.4 KB Created: 2021-03-16 11:21:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f184cbbfe519ef88b79578418c0f7139 SHA-1: fd25f3afa60532720626512e09ab4da39379d227 SHA-256: e64bebea36a8e6b6bdbdaaf9d5951badae209904de06e95ce2322dc921db03ac
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. The primary URL, 'https://leonvi.ru/award?keyword=common+laboratory+apparatus+pdf', suggests a tactic to attract users searching for specific terms. While no scripts were explicitly extracted, the PDF structure and extensive URL usage indicate a malicious intent to redirect users to potentially harmful or deceptive content, aligning with phishing or spamming activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 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.
  • 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://leonvi.ru/award?keyword=common+laboratory+apparatus+pdf PDF link annotation
    • http://bafakuvim.sportsontheweb.net/equivalent_fractions_super_teacher_worksheets_answer_key.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/antropologia_kulturowa.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/how_to_scan_multiple_pages_canon_mx490.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_97abeac4c0404ebc81d4140f4197eb47.pdf?index=trueIn PDF document text
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_9b8871b2cc824d109f37e809a9d48f61.pdf?index=trueIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_4883e331c2e34e8fad93d70ec0c43373.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pisedij/bepebemetogukisuve.pdfIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_dc621b8fe26040f5b4dc095e35273dbf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kujesulad/jetpens_mechanical_pencil_guide.pdfIn PDF document text
    • https://e72deea9-3c4d-48de-8429-d2e8e2d5d9b3.filesusr.com/ugd/68b2df_bd53f38f04be45129711d5855a5fee54.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/nemigi.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/49948123752.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/ramozegewijedifuponiju.pdfIn PDF document text
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_35351156e9ee411aac29e401bc0c200d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firudegix/nalujibere.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/23783839100.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/google_play_store_on_samsung_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/zetaxiz.pdfIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_2eb04c5fcd554e148d0d1c893d817e4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/31798810031.pdfIn PDF document text
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_5f6d7f16935f4395936f142ca71081e5.pdf?index=trueIn PDF document text
    • http://zagofij.onlinewebshop.net/66264842707.pdfIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_7b539b2cee6b454f9daf2000b5a9c32b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/mewapajugotapa.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/16692055415.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/boss_tu-2_vs_polytune.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/androides_dbz_13.pdfIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_7064464e38a4459e84653d5478416c19.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/23645733017.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_off0000f101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF101 5332 bytes
SHA-256: bfcc261fb6677e3f75029b2cbe5a91724ca9d3288357c0daeb238cf5ecc6d889
font_01_sfnt_off00010307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10307 10896 bytes
SHA-256: fe100e89bcc2445af447dd1e9a60f806f6af687797e08ba08c6829f770302871

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