Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce16ca544929460…

MALICIOUS

PDF

77.2 KB Created: 2021-06-07 07:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7a77b2ca7e26663e48d50eb3420ac435 SHA-1: 3db14cb21546087a3fc09be447e986b0618f9ed9 SHA-256: 0ce16ca544929460796f2a728669a438dbda7fa1cf28da564462cb7aba033e83
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one leading to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to nutritional information, suggesting a lure to a deceptive website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://inwebjor.ru/pbw?utm_term=cuantas+calorias+tiene+1+cucharada+de+mantequilla+de+mani PDF link annotation
    • https://wivezinafixozut.weebly.com/uploads/1/3/0/9/130969190/8976785.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488332/normal_5ff934fc5c711.pdfIn PDF document text
    • https://kozipizifepawu.weebly.com/uploads/1/3/4/6/134631686/7689638.pdfIn PDF document text
    • https://maxegexetafes.weebly.com/uploads/1/3/1/3/131379525/140263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_6042c89b69146.pdfIn PDF document text
    • https://marizezibafive.weebly.com/uploads/1/3/4/8/134865590/9936472.pdfIn PDF document text
    • https://sivikowililip.weebly.com/uploads/1/3/4/5/134599649/1d75a45ba0ed.pdfIn PDF document text
    • https://voluwunuzusiju.weebly.com/uploads/1/3/1/4/131452861/1105536.pdfIn PDF document text
    • https://judexibegajojid.weebly.com/uploads/1/3/4/8/134885636/dogulixolibevefif.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
    • https://uploads.strikinglycdn.com/files/a24df006-2af2-4981-ae5a-a5b77eb1754b/fm_whatsapp_latest_version_8.65_apk_download_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d891bff-9d9e-418b-a298-af249549fa5a/luwegubesefenexuzutedal.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/w/file/fetch/144446727/rakekabezo.pdfIn PDF document text
    • http://tereburokofe.pbworks.com/f/4781778380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f24a37b1-9e78-4849-8676-6c65e3d98eff/watts_premier_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11cfa66e-637d-4239-afbc-30654640859f/97547387518.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/deweratumogotup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d669ecd-e58c-477c-92cc-1a039af34356/brother_p-touch_pt-65_label_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de74cf2-9fc7-4af7-a11b-82ae2cfa3064/n6_mechanical_engineering_salary_in_south_africa.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_off0000e2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C9 5260 bytes
SHA-256: a183d4a58d5747a3a9c1f890bca4c5ffe6e822bd07fda534db6d450150d4474a
font_01_sfnt_off0000f477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF477 11112 bytes
SHA-256: 0647b379cfc50558b6e9835b075870570dff63151e28dab32073fd813e2d3d89
font_02_sfnt_off000118b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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