Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca338c3dd31b181…

MALICIOUS

PDF

73.2 KB Created: 2020-12-20 04:12:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7cbfd242614e371b7e90496408b0bca6 SHA-1: 939a5f57c8fb3e791f180caea071631347d5a551 SHA-256: cca338c3dd31b181df1cac01c5602d79c06846b0bc291f9bd1c910dd7f3a5ab1
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the PDF structure suggest an attempt to lure users to malicious sites, likely as part of a phishing campaign or to download further malware.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/strik?utm_term=teacup+pomeranian+price+nyc In PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/6497780.pdfIn PDF document text
    • https://gunobodupisar.weebly.com/uploads/1/3/4/6/134677737/5244576.pdfIn PDF document text
    • https://piwirajaluz.weebly.com/uploads/1/3/5/3/135312697/1079781.pdfIn PDF document text
    • https://figenudar.weebly.com/uploads/1/3/4/7/134754197/dalozuzalufuwax_fawoj_simawutagaxudod.pdfIn PDF document text
    • https://jivudajen.weebly.com/uploads/1/3/4/4/134470456/genazaxesoxipej-bijazejebakunur-vavugojofuzi.pdfIn PDF document text
    • https://rigawegafo.weebly.com/uploads/1/3/4/5/134587157/zejilorizojup.pdfIn PDF document text
    • https://luvoseguz.weebly.com/uploads/1/3/4/6/134665560/zetiropepu.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/kunare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454822/normal_5fcec0f7a5ae7.pdfIn PDF document text
    • https://wuwoxidip.weebly.com/uploads/1/3/4/4/134492879/3606486.pdfIn PDF document text
    • https://poxapoxidofex.weebly.com/uploads/1/3/4/0/134016688/b8b76b903359b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc537ae0a2757459bff2ea8/t/5fd1fd6ac10336458b3ba118/1607597418924/33068048389.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcab432373c863b887b4f8/t/5fdcb756cc930526a048d016/1608300374418/comets_asteroids_and_meteors_worksheet_pearson_education.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c50e1c8c741314534cd3/t/5fcb5388b6b7366152f6de1e/1607160714533/i_dieci_gladiatori_film_completo_in_italiano.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8f692c50b1a1e77efcd/t/5fc8f06f69ef50344149565e/1607004271600/warrior_attack_with_the_stack.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA76 4920 bytes
SHA-256: 3f2270ef2d2cec25d24834cebc829032345624801497b96cc105a8484b883978
font_01_sfnt_off0000db2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2A 11316 bytes
SHA-256: 2d42f8d0ff55259bffe1f89081af017ba00a140b0aeece01427a3ba024988e63
font_02_sfnt_off000100a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A0 16876 bytes
SHA-256: 1be64b570a0754b3bc99bb92035be9e11095559512f4f6582332ab0c15996876

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