Malicious PDF — malware analysis report

Static analysis result for SHA-256 68917cc77e1c0e1e…

MALICIOUS

PDF

80.0 KB Created: 2020-12-24 19:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ae07a3fb110eb2cbb778e4f927ceb0af SHA-1: 1f2c450129d42f63c2e7384e14bae5dad97fe53f SHA-256: 68917cc77e1c0e1e6f03bf7b8f042a7273160cdeee91e4d8065d73d1fa467e85
222 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, routes users through malicious redirector infrastructure 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
  • 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.
  • 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
  • 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://ggtraff.ru/aws?utm_term=ikigai+book+pdf+free In PDF document text
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/6554482.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451375/normal_5fd056a26ffbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415051/normal_5f95731a85a77.pdfIn PDF document text
    • https://xobijetulotifo.weebly.com/uploads/1/3/4/2/134234675/vebejajumanejuba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480905/normal_5fd680bfecf65.pdfIn PDF document text
    • https://jokozoxusatolof.weebly.com/uploads/1/3/1/0/131070378/xilaxubakati_xaxobipiwadu_lulinafikekirit_gusux.pdfIn PDF document text
    • https://verosogoteri.weebly.com/uploads/1/3/4/7/134738646/5bb396c77af9f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415081/normal_5fd60fc6cab2e.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/00fcee81-4140-4707-a309-5533a0cdb6d0/fisher_paykel_washer_agitator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af81949a-a7e6-4eaa-8258-96e25eeb9e66/wujad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bababe6b-d2ab-4a05-b59b-742bedeebf15/uh_manoa_spring_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dd75bbd-d921-47a3-9510-4e386024ecb5/ledaxiziwurifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d688620d-920c-46b6-ae03-4359e319d60d/70503703896.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B0 5140 bytes
SHA-256: e923d7d5841d9cc1ecd7018feb72933f12a53e06043356688c72e32e31cdc470
font_01_sfnt_off0000f841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF841 11080 bytes
SHA-256: afdd0f63170241909f52c1af79e23cea2f17320f1ffcac93975eb3d9cd5f0f28
font_02_sfnt_off00011e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E38 16172 bytes
SHA-256: 7f268005b80ff82e89639affb95403f55eddb42516abbde6a76e27226db124cd

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