Malicious PDF — malware analysis report

Static analysis result for SHA-256 15227d2914920b17…

MALICIOUS

PDF

82.6 KB Created: 2021-03-19 03:24:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 62d32af66675a55bd282b28928be8bdb SHA-1: 1543db7a853a7adde47bddc702e6edacda26010b SHA-256: 15227d2914920b170b67fef971f0aebc111de6e4e24e5b2d115b55708ff2af40
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://fokemale.ru/strik?utm_term=best+true+wireless+earbuds+2020+australia PDF link annotation
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/681b97b62d14592.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/2Xf0ihA/virtual_classroom_ideas_2nd_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/jeZl8he/82006940471.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/3gehdlH/retronix_international_mesa_az.pdfIn PDF document text
    • http://jewlgems.com/safari_2020_price1zqjs.pdfIn PDF document text
    • http://didazema.mypressonline.com/how_to_fix_dryer_wont_start.pdfIn PDF document text
    • http://ritixibetono.mygamesonline.org/boston_street_map.pdfIn PDF document text
    • https://pedagojewixa.weebly.com/uploads/1/3/1/3/131398360/8999905.pdfIn PDF document text
    • http://momentshop.space/kedoxowozagusivasamuluda50gaq.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/hhjjche/45451737890.pdfIn PDF document text
    • http://fijazubelanulek.mywebcommunity.org/all_about_space_issue_81.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/bhgvGdj/leripibava.pdfIn PDF document text
    • https://cdn.sqhk.co/neviragar/hk5JBcM/13217786801.pdfIn PDF document text
    • http://test123test.xyz/anyways_messenger_for_androidh8a7v.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/jawinunime_nonibubesap.pdfIn PDF document text
    • https://xutepodufolesik.weebly.com/uploads/1/3/0/7/130739265/fdf0d3.pdfIn PDF document text
    • https://gadonivoxe.weebly.com/uploads/1/3/5/3/135331758/4065256.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_b5dc3164e21b4f71af0d05e8b9b0437c.pdf?index=trueIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_1659417ebdd4455a96e2203119d0e484.pdf?index=trueIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_a983e3c073aa40d09e9bee74fcc71168.pdf?index=trueIn PDF document text
    • https://74a5c9af-61bb-4d76-9351-4d02c0bf652a.filesusr.com/ugd/e33828_88846b036a984e849fc81b431e41ba18.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10537 5372 bytes
SHA-256: 6317498daaa46ff816a7d5b98b754eb8022a1bf673f5a92e0c1dd96989f72874
font_01_sfnt_off00011798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11798 11044 bytes
SHA-256: 6fe16d1d8f2c99c237568f03744b18ab5bba98ff557e6cec2d2592cecdfc4bab

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