Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0b73aee505c4cf…

MALICIOUS

PDF

64.1 KB Created: 2020-12-23 09:52:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b24a84573171c41885f9a553f2e603fd SHA-1: bb8a18e9fbfafcff14fb0c5b660fcab583e2e1dd SHA-256: 2d0b73aee505c4cf06092b32eef57b82ce90ca6b3c72fdfb9c822dd4f072b3da
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=basara+heroes+ppsspp+iso PDF link annotation
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/4f95c8fbeecf0.pdfIn PDF document text
    • https://sapakokejepudig.weebly.com/uploads/1/3/4/4/134457578/53478d8.pdfIn PDF document text
    • https://wenajatimox.weebly.com/uploads/1/3/4/4/134480159/8453369.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/kunigotifuxevotuz.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/vasagesorajirem/xejiguvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c0ed84-56f9-4f88-a0df-d26424014644/9109160792.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/painters_dust_sheets_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3366644d-28ac-441a-804d-5d6639782234/wusigezaxogobuvowipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc7fd6ed-62f4-4420-9c89-007ceaa8f322/zoribedobidevixome.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/excel_sum_cells_multiple_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f9c319-4a02-450e-bcad-5eb796312615/jevaja.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/15362303957.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/east_baton_rouge_parish_warrant_list.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C2 3968 bytes
SHA-256: 13e9468de7fa313610d0df5c676d31cf6d306f78362477d359086e90ed17007a
font_01_sfnt_off0000bedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEDF 4924 bytes
SHA-256: e86634ce9e02457157c5c1848f89306d1f4e18a7e3d132b373cd7a30a205a455
font_02_sfnt_off0000cf98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF98 10460 bytes
SHA-256: b539419a149a43a47132ac20a43a8d7ab8417daedbf6e839e7c6835c49c27f96

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