Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9473cf63f17920…

MALICIOUS

PDF

72.7 KB Created: 2021-03-07 04:07:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3c01aa4ea1e93882915bcd18beeae6a6 SHA-1: dde1d133578a6b6e950cc7ff25692c83fc9cdb49 SHA-256: cc9473cf63f17920fda606dee949ae9091a71354f19f353f044d9260ce5718b2
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a significant number pointing to disposable hosting and link farms, suggesting a phishing or malware distribution campaign. The PDF structure and embedded URLs are indicative of a spearphishing attachment, 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://jacksth.ru/wix?keyword=the+way+of+kings+read+online+pdf PDF link annotation
    • https://tutonaxubetu.weebly.com/uploads/1/3/5/2/135296536/rovepozufanite.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486201/normal_5fec917738bb0.pdfIn PDF document text
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/4265647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488810/normal_603b7f8655a29.pdfIn PDF document text
    • http://mapugukabazewu.scienceontheweb.net/is_ben_10_alien_force_on_hbo_max.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/13344150850.pdfIn PDF document text
    • https://besavijoxamidu.weebly.com/uploads/1/3/4/0/134096513/vumiwawakotam.pdfIn PDF document text
    • https://wutawodasigupo.weebly.com/uploads/1/3/4/5/134512212/tijuwikodeg-sojip-xakuriga-degopesekozi.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/how_to_read_a_book_the_classic_guide_to_intelligent_reading_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_600c6ffb6969d.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/davakifamewuloga.pdfIn PDF document text
    • http://melomone.scienceontheweb.net/trouble_obsessionnel_compulsif.pdfIn PDF document text
    • https://butilitari.weebly.com/uploads/1/3/3/9/133997497/lidilelar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8984adf4-d57e-403c-964d-2ad49a1f4d0e/how_to_set_time_on_5522_g_shock.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/befutat.pdfIn PDF document text
    • http://zogoxuf.atwebpages.com/twilight_eclipse_full_movie_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/defize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28f1b2c-6c98-4bf8-b158-ce6dc217f357/15646376047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75d39a87-0b38-460b-948a-b72a9d40c557/bomepat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab30d622-45af-4254-badd-3722c99fa5a8/54431421684.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/activinspire_windows_7_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/kuberifafuvurugisavu.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_off0000e0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CD 5512 bytes
SHA-256: d960ff77bc3f08adb088e2b987d62bace67c78b2f564f5e172c6656abdb84bb0
font_01_sfnt_off0000f3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 9848 bytes
SHA-256: 9d23b750708e97c00c7ca0a798d0b37dabb392bcec144462945e9574b32bb975

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