Malicious PDF — malware analysis report

Static analysis result for SHA-256 b739aaaa5cf81c29…

MALICIOUS

PDF

84.0 KB Created: 2021-05-14 08:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 144e9ec06e4c9c9be40c5d1974d632d7 SHA-1: 279b581f8aa9474f2f926d884e329bd109617658 SHA-256: b739aaaa5cf81c290792d214bd1380ac656f94c52409b0677d6d4613d7664bae
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV, which identified it as a phishing trojan. The PDF contains numerous external URIs, with one prominent URL pointing to 'ponafet.ru', suggesting a phishing or malware distribution attempt. The presence of many links on disposable hosting further supports the link farm heuristic, indicating a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=ryobi+leaf+blower+40v+battery+life PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372681/normal_5fe6f585b1818.pdfIn PDF document text
    • http://julivojurukumu.sportsontheweb.net/bossard_catalogue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389354/normal_5ff2591993eee.pdfIn PDF document text
    • http://nicepics.xyz/file_form_05-102_onlinecwphp.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/simple_cricket_score_sheet.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/80497696146.pdfIn PDF document text
    • http://pubofumoxo.scienceontheweb.net/49145723924.pdfIn PDF document text
    • http://pl50off.info/american_beauty_full_movie_in_480prbezh.pdfIn PDF document text
    • http://begetus11ppz.xyz/puzitvvm44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_605040e58fe3c.pdfIn PDF document text
    • http://drovazvenigorod.ru/xerox_wc_7545_fuser_system_errortmvvn.pdfIn PDF document text
    • http://gratoramaa.space/ruparezuj8h4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vubuzixefixa.onlinewebshop.net/aashayein_song_lyrics.pdfIn PDF document text
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_5a9c3e6c5a98464aa4ee112fe0cb007c.pdf?index=trueIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_4b8f021b5d86471da021a105cea8d164.pdf?index=trueIn PDF document text
    • https://6ce95562-7558-49ee-a7b0-b3003db3b0e9.filesusr.com/ugd/d13e1f_2c9a951169fe4f4ba52af0b2482c6959.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekife/62347168366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73fdc233-eb55-411f-8733-40365aec11e3/stylistic_analysis_of_the_road_not_taken.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154b5495-c052-4c10-90c6-d2625b050b63/world_physical_map_with_oceans_and_continents.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/zeziwotifajizewawitaligo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE57 4896 bytes
SHA-256: 7ec182c7d62096e27449bc1d41fbcfd6def0689f1689eda7165b75d53a310829
font_01_sfnt_off00010f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F31 10948 bytes
SHA-256: dbf7e9219e9b4341455d16502d2b04a80bf6e58bc44b0de742abf3d07cae0285
font_02_sfnt_off00013473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13473 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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