Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9572d542afa9719…

MALICIOUS

PDF

78.9 KB Created: 2021-03-01 04:49:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1c4b36e4fc93d2934d8d0d5f129abb52 SHA-1: cc50d5282402f3b5c4da82b3a52f8e6865eed8d9 SHA-256: d9572d542afa97192b9ec23efae2d6aba73e61b7b1f554afd3a8a62ccc31b952
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains a URL that mimics a search query, likely to trick users into clicking through to a malicious site.

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://pelibifir.ru/123?utm_term=why+is+my+fitbit+charge+3+touch+screen+not+working PDF link annotation
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/df29d.pdfIn PDF document text
    • http://center-san.ru/fexaresoniboted1b2w8.pdfIn PDF document text
    • http://1yamal.space/forcibly_guided_contacts_mechanismyzur1.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/lajudewipofez_lakawavafabupof_gurilofemaluwig.pdfIn PDF document text
    • http://idealicaitalia-official.site/290935594351toio.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/jgcicja/33657038967.pdfIn PDF document text
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/gojizupozijitim.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/83227095352.pdfIn PDF document text
    • http://telgrm.site/zuzokoliwiwowakavasesifxhx3y.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/dcgfBjb/commuter_rail_boston_to_newburyport.pdfIn PDF document text
    • https://cdn.sqhk.co/degavorofala/jIjajgh/jolutedabekalabi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388814/normal_600ba9d61e8d9.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/jjhghie/puppy_runs_sideways.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/ic5btgd/garoxelekojofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_5fe79677b9636.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://gukuwet.epizy.com/what_are_comprehension_questions_types.pdfIn PDF document text
    • http://nadiripu.epizy.com/vidmate_install_free_android.pdfIn PDF document text
    • http://pabaxekuvo.rf.gd/mapbox_gl_android_sdk.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_off0000e8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F8 5720 bytes
SHA-256: 4e1ae799ba1fd2ca763b42a5ace3c35b6ab93c7bf7242040036fa8d2248daa9c
font_01_sfnt_off0000fc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC68 10416 bytes
SHA-256: 647d64b408d46ddf7aa4d1d1d754b7241392d4aef332b0b210b6dabd75e3a625
font_02_sfnt_off0001201a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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