Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48bea91c31d2a69…

MALICIOUS

PDF

62.4 KB Created: 2021-01-06 09:07:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a9585f3c5a8b5bf8388e9a2648945633 SHA-1: 9f0a06cb0cb912b078e958cea65c3cf906b49733 SHA-256: f48bea91c31d2a694a500674bcc8d98a9baf90859c13109e651530d5dcc3a375
172 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. It uses an urgency-based lure. 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 0.9996

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffking.ru/123?utm_term=quranic+arabic+grammar+bangla+pdf PDF link annotation
    • https://cdn.sqhk.co/jixavome/je0Yies/naweralux.pdfIn PDF document text
    • https://cdn.sqhk.co/wutalididow/dHjixRx/transfer_companion_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/Dejiaja/52152702331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412996/normal_5fe74ecff1aea.pdfIn PDF document text
    • https://kodowogokilikid.weebly.com/uploads/1/3/4/4/134466607/819344.pdfIn PDF document text
    • https://cdn.sqhk.co/fofasafiwi/ig3ma9H/50751262477.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/Ajiijie/bell_bird_feeders_new_zealand.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/9a3fa48b-583c-4a6a-b307-ca60aa8a2d8b/heilbroner_the_worldly_philosophers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a7ccef1-7c1a-4a43-b279-ac7b80b746c8/1363795391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b79975-274f-4387-9613-96e8e873a05c/bonne_annee_by_jean_pierre_benoit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e57d85bd-0466-4cfa-9286-8a3d9f56d1c5/ancient_china_webquest_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/674f4f63-3d5a-4baf-b589-96fe93cf5db4/45326503875.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_off0000b819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB819 5500 bytes
SHA-256: 9cef3037051a2576f0e0214f8498b4c3b8f9c8b17e8afd2238a8c6635fbbb07a
font_01_sfnt_off0000caaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAF 10108 bytes
SHA-256: aff649cc4490572f905313232810f11c63177af2e999264b72ae88c98aa30ff6

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