Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcebe3b42491c74b…

MALICIOUS

PDF

77.6 KB Created: 2021-06-09 04:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 40be63baa62e3f3b9295204396847864 SHA-1: afeff08054700e077a683ff419e1a59f432457af SHA-256: dcebe3b42491c74b9f060fbe55d7aa349686b207583b6577b6ef15f32109187c
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains references to 'Baby's day out download 720p' and authoring information, likely a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://philabc.ru/pbw?utm_term=baby%2527s+day+out+download+720p PDF link annotation
    • https://kifowufowuvix.weebly.com/uploads/1/3/5/3/135392599/xesipevo.pdfIn PDF document text
    • https://wirujofijiv.weebly.com/uploads/1/3/4/5/134592393/furunumeveve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470964/normal_5fec8aa671a0b.pdfIn PDF document text
    • https://girowefado.weebly.com/uploads/1/3/5/3/135349553/c5fed21c751b4a.pdfIn PDF document text
    • https://boralixaki.weebly.com/uploads/1/3/4/4/134479476/medamekuki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420765/normal_603f53c96b3c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_5ff7125e56926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382974/normal_60175eb72a639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443342/normal_602421cfe53e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393506/normal_6052ed4ea044d.pdfIn PDF document text
    • https://lekomitigukajar.weebly.com/uploads/1/3/5/3/135345412/dokakivininanomaze.pdfIn PDF document text
    • https://muxiduxipa.weebly.com/uploads/1/3/5/3/135319221/6fac3.pdfIn PDF document text
    • https://muzobigen.weebly.com/uploads/1/3/4/3/134310091/talolagiboxevojav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_6023c7a71f7fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463824/normal_601b397ed2d13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452148/normal_5fe010bce98df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozobitativi.pbworks.com/f/71247932143.pdfIn PDF document text
    • http://tusawijer.pbworks.com/w/file/fetch/144650007/.pdfIn PDF document text
    • http://katexawa.pbworks.com/w/file/fetch/144683964/adobe_photoshop_2019_crack_mac_reddit.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/f/possessive_case_exercises_advanced.pdfIn PDF document text
    • http://zopilep.pbworks.com/w/file/fetch/144703392/17935033400.pdfIn PDF document text
    • http://nadupodifado.pbworks.com/w/file/fetch/144448212/competency_based_interview_questions_and_sample_answers_civil_service.pdfIn PDF document text
    • http://jobojifitin.pbworks.com/w/file/fetch/144452127/introduction_to_airborne_radar_free_download.pdfIn PDF document text
    • http://kenoxipej.pbworks.com/w/file/fetch/144795312/how_to_fix_a_kenmore_ice_maker.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_off0000ecd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD8 5628 bytes
SHA-256: 528f02e8d303b4cdf7a11775fc9efa4aa3fa34d860a007c327268adf32540968
font_01_sfnt_off00010037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10037 13412 bytes
SHA-256: 9d769b62a7c97b1d9f9aefa1fd5f6463d399d6e6228f85c01e8eddfd592a519c