Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4d57459bc8d87f…

MALICIOUS

PDF

78.2 KB Created: 2021-03-22 18:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f327beb5598bc2ceeaf92ffbe453fd43 SHA-1: 813c587add983de8902ef722242ec88eba80a464 SHA-256: 0e4d57459bc8d87ffb6580542a718650729a0c2b624b8cb0d95a63ca1d827200
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, characteristic of an SEO spam or phishing campaign. The primary URL suggests a lure related to smart TV streaming services. While no scripts were explicitly extracted, the PDF structure and the high ML and ClamAV scores indicate malicious intent, likely involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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://kuzutuzo.ru/strik?utm_term=how+to+add+disney+plus+to+lg+smart+tv+canada PDF link annotation
    • https://pavibizad.weebly.com/uploads/1/3/0/7/130740264/5718447.pdfIn PDF document text
    • https://bumeguzi.weebly.com/uploads/1/3/5/3/135391430/6827755.pdfIn PDF document text
    • https://rebageronamit.weebly.com/uploads/1/3/0/7/130775484/4754057.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/vofujo.pdfIn PDF document text
    • http://fosukimiten.22web.org/marvel_movies_list_in_order_download.pdfIn PDF document text
    • http://kupimaxi.sportsontheweb.net/vunikop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://solarujarinobo.myartsonline.com/15006687950.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/best_free_vpn_app_for_android_china.pdfIn PDF document text
    • http://finunaji.rf.gd/kitosikadegeseronajegi.pdfIn PDF document text
    • http://nopowilaleso.rf.gd/witonigokawojibok.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/32153958488.pdfIn PDF document text
    • http://vobozezojip.onlinewebshop.net/all_in_one_science_class_10_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/d_d_5e_premade_character_sheets.pdfIn PDF document text
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_fa7714ff236445cd8cc1ec39359f1f4f.pdf?index=trueIn PDF document text
    • http://teguwawax.rf.gd/music_orchestration_books.pdfIn PDF document text
    • http://faturorevilovog.epizy.com/3801604911.pdfIn PDF document text
    • https://050a9d39-d8a1-4107-8be8-b2b70b72e454.filesusr.com/ugd/5262df_360571c5bf4843e8a8de228e85a5c0b6.pdf?index=trueIn PDF document text
    • http://foviwapiwob.rf.gd/befufedemufikizefo.pdfIn PDF document text
    • http://bixozebaxikapos.atwebpages.com/mifukoxasep.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_d4ce859f2cda48f08810742ede69dbc9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sewamos/653088248.pdfIn PDF document text
    • http://lekinip.epizy.com/68471061316.pdfIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_3bcb85820b43479e8872eec51d47cc28.pdf?index=trueIn 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_off0000f310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF310 5608 bytes
SHA-256: b0d8fe08a77ad7ee4d8a3003649fb18faa82e90ad43407027d265a8a09eacf59
font_01_sfnt_off0001062d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062D 10768 bytes
SHA-256: 3a22240733171db001b10bee75e0998df6d78c78a68d1d06b14393e39b523ddc

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