Malicious PDF — malware analysis report

Static analysis result for SHA-256 43bbdc4258199f64…

MALICIOUS

PDF

74.4 KB Created: 2021-05-02 06:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ff26b2fe115f3f5a0266cf59ccb81f89 SHA-1: 24d4aa067de4d92910d4c6cfa828803edecb8375 SHA-256: 43bbdc4258199f648a676ff780b9cdb8614360f129472608776253092347eaec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains text related to pregnancy, suggesting a lure to attract victims to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/strik?utm_term=which+food+is+good+for+early+pregnancy PDF link annotation
    • http://bigswinner.space/waxabixirubowu8ixud.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/hb7hhgh/mucho_party_apk_full.pdfIn PDF document text
    • http://supernefritroller.xyz/mutevabosiwibidikis32e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476274/normal_604fff36eac72.pdfIn PDF document text
    • http://cooldomen.space/sony_playstation_vita_2019dw441.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/ibIGqKs/54163760300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418013/normal_603af7fb22664.pdfIn PDF document text
    • https://cdn.sqhk.co/sadetujadufi/al7jgPj/wizitupasisotekiduxatam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_6046112db0ba1.pdfIn PDF document text
    • https://xapenivivafozeb.weebly.com/uploads/1/3/1/3/131379266/rolavo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369775/normal_5ff3bb5fb3aa3.pdfIn PDF document text
    • http://fasad-dom.site/gomeme5zj6a.pdfIn PDF document text
    • https://cdn.sqhk.co/zekoparan/jhdoQx2/disney_movie_quotes_quiz_with_answers.pdfIn PDF document text
    • http://sadovik.me/mastering_malware_analysis_downloadjrvkp.pdfIn PDF document text
    • https://nezuwiwobitedut.weebly.com/uploads/1/3/4/6/134600585/3150646.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cc0b58a5-7bf4-4b41-9cd7-d9bc0cd2cc6f.filesusr.com/ugd/6dc98b_4f9e1df6c67b48b4a404747151b2eb75.pdf?index=trueIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_6f7a287d232a4aa08c9eac6856c98c42.pdf?index=trueIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_05c14cca9d6d4bd3a2b89492571c6e31.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b798538-82ea-49ee-91b4-80c8cd1e11b7/movilizatolilafeviz.pdfIn PDF document text
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_b127395cf7bb420382f92e05e4e8f880.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5255f2e2-99f1-4b81-9662-8d309d28ed64/what_is_the_price_of_a_2009_toyota_corolla.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C7 5532 bytes
SHA-256: 2664356308c5d404d56a4e4bd2b019ede7c3416bdfc66123db97138ca3b36e82
font_01_sfnt_off0000f8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B0 10220 bytes
SHA-256: 122b2ed4cc45231c5bf20a36bbeffcadb73756704d2df0b200fd072de9f31829

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