Malicious PDF — malware analysis report

Static analysis result for SHA-256 99fa19a140da6a09…

MALICIOUS

PDF

83.6 KB Created: 2020-12-28 13:10:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ce37c22084a74e96818db2b66b8e11a5 SHA-1: ecedc39c57bca207eae5c33a8ed2b0f7d7733e49 SHA-256: 99fa19a140da6a09b84db33e5ce7060fbf596e03a5237cd60e4f0e548ce40afd
156 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 external links, many of which point to other PDFs, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, particularly the one to 'trafficel.ru', are likely used to redirect the user to a phishing or malware distribution 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 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.
  • 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://trafficel.ru/strik?utm_term=southern+living+pound+cake+recipe+with+cream+cheese PDF link annotation
    • https://cdn.sqhk.co/jekefebiba/hgdKZjh/dwight_howard_fiance_age.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_5f9db69ade2eb.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/gcTjcJe/47076393874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f8717911b1a9.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/Ib8hdRL/beli_pulsa_di_shopee_bayar_nanti.pdfIn PDF document text
    • https://ratudagusamidux.weebly.com/uploads/1/3/4/6/134692006/sazixunaz-fazev.pdfIn PDF document text
    • https://cdn.sqhk.co/zajujuva/jg1ja47/6224094596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390641/normal_5fa2f817683e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5f8a11d43093c.pdfIn PDF document text
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/vaketurep_zinebuvis_dalepeniba_mofupu.pdfIn PDF document text
    • https://limuvowefegepud.weebly.com/uploads/1/3/4/5/134509231/libofapuvafugoxovek.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/8etEheK/82155773432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5fd2a52627afb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/magazine_layout_template_publisher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a4f52c2-5ef0-4045-98cc-a60ec96b7894/car_eats_car_3_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23daf9a0-2b5b-4a6a-9028-55d0f8faa99e/ion_product_expression_for_lead_ii_iodide.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_off0000f1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B9 5804 bytes
SHA-256: c8f1a82e5c270e5cc75a9ddaa3b1b09f3c5fa8c4ef4cb185c50495c9f9af3653
font_01_sfnt_off0001056a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056A 10940 bytes
SHA-256: 57857d85d91a0170f74c170ddeb4c56f0b79c96457865e1199dc61f52d642980
font_02_sfnt_off00012b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2E 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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