Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15c24a57d65bc58…

MALICIOUS

PDF

71.2 KB Created: 2020-12-17 07:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7d4f03c50affbcba996c0c08b56755e1 SHA-1: 9d19acf3be2b854547454c84b1ba45f434ca819b SHA-256: a15c24a57d65bc58c1ee85d30a267a23fdae54fc2f1b56d960298cd49a4ff85d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://traffnew.ru/strik?utm_term=high+school+musical+chad+and+taylor PDF link annotation
    • https://xepuxewezikute.weebly.com/uploads/1/3/4/4/134437058/buronanevoke_nifibexob_ninidawaba.pdfIn PDF document text
    • https://bevabuje.weebly.com/uploads/1/3/4/8/134897483/669ee6a4.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/5fc4c63627a199023ace4336/t/5fd0ee22281fa65349f52ba1/1607527971650/52296426013.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfd5d173fb5383b682a37/1606286688144/16553022843.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/nuzenugonurovewoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/604e5842-7cef-47e6-9a12-f2962c202c43/abbyy_finereader_12.0_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3d8d31452f90b7ff7981f/t/5fc3f845173fb5383b1e6ef4/1606678599644/piazza_del_campidoglio_plan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d1fde5c7695ca9b4aca3/t/5fc544e81972c46e3c4ad98e/1606763753334/r_letter_words.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79814100abc42af3e4ce9/t/5fcb799bda45e86ccaa414cc/1607170459955/how_to_redeem_globe_rewards_kfc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5048cb3e0f5771460b2e/1606373449424/fopinemikarakope.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffc42bda9c57a97b92422/t/5fc12b1b3f75b16643fe5238/1606495004707/kugubadojop.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2af36df132613bbc92a03/t/5fc6206808845d09245c1ba3/1606819944871/cycle_kart_racing_near_me.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53481c30a162e0c6eae90/t/5fc767ef2ac13f1ee9bad568/1606903793581/domixa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51282e9fc3622d53cd60e/t/5fc9ea422e4d7f67ca2e38fd/1607068227683/83211104714.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1D 5416 bytes
SHA-256: 8d1285caea12729cf102fca43bcd81d14987b837f2020f95182dbb6b7dcff2c0
font_01_sfnt_off0000ec67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC67 10292 bytes
SHA-256: f6a47ae574741bfcbeb1e42706b0ea3531de61088ef95a8efb449a5db3fc1e81

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