Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfcaacd412337bd1…

MALICIOUS

PDF

82.5 KB Created: 2020-12-09 22:00:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b251fdd98918ebe85f3f13c6ca7efed0 SHA-1: f010a1014c7c07e94c92d3386ae14f8267e14da1 SHA-256: bfcaacd412337bd1067ffccb96f052153bd7b5d2e0e6128374292a6aaf4de59f
214 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/aws?utm_term=bumblebee+transformer+instructions+toy In PDF document text
    • https://zavamemedu.weebly.com/uploads/1/3/4/3/134305249/temabot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0336f320-f01c-422a-8403-2436e4908ef3/dazofixemevopedimomer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44bc8968-1772-4587-adfe-1618e52860b2/velmurugan_amma_song_pathu_masam_mp3_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f00796-ec53-435a-ae4f-af29a2a7b300/watch_warrior_online_free_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/16135699184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e60800f-2270-4587-ac66-f3ef23a6fea6/famuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19cc5a8b-ff15-497f-aedd-de5f90c9fb64/tony_robbins_unshakeable_free_do.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cad8506-0ed7-4344-a397-d4ec540e1f1a/tabemolokuzagajarof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aff3d48-063e-4bc6-96c3-25d4482b2f8a/pennsylvania_farm_show_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6dc0f64-1694-4dd0-8301-d47dd51f8fe2/44099596369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b3211c-25e8-42c5-9d43-767a282fea0d/77195882931.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/69841368693.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/modiramuzizagibiboruroko.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_off0000fd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6A 5316 bytes
SHA-256: 61341063b555ebe7561c9840ba3290450376ef65250bf6a3880435a5bea90bf8
font_01_sfnt_off00010f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6F 14772 bytes
SHA-256: a8e6e626eb3cae9f412f1e11b2d76fd88182df46522cc5b0db4900c8f2692f55

Open this report in the interactive analyzer, or submit your own file for analysis.