Malicious PDF — malware analysis report

Static analysis result for SHA-256 69512fb257ffc3ac…

MALICIOUS

PDF

77.3 KB Created: 2021-01-30 15:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b442875ea3aaafd5cc8fa36879b7796b SHA-1: 47968e2b23f3640e63834fb6209945970c36bebe SHA-256: 69512fb257ffc3acd0707d4321cdbe023e65ddc6a4315c1a8317fff1bd5594ff
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a spam or phishing campaign. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to direct users to phishing sites or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/123?utm_term=you+are+here+thich+nhat+hanh+pdf In PDF document text
    • https://cdn.sqhk.co/tuseliwi/cicL2RT/pexetezafosisimuxugewug.pdfIn PDF document text
    • https://febosefukeja.weebly.com/uploads/1/3/5/3/135324858/3238960.pdfIn PDF document text
    • https://cdn.sqhk.co/dovoxukeni/cnJihia/switch_audio_converter_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371514/normal_600562753ddb2.pdfIn PDF document text
    • https://cdn.sqhk.co/pixisuja/icjdY4a/kick_the_buddy_2_online_game.pdfIn PDF document text
    • https://puzaloraren.weebly.com/uploads/1/3/4/5/134510283/sotilibepasone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393359/normal_5fdff998c78da.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/h46ePia/best_free_qr_scanner_app_for_android_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383928/normal_60038fa909205.pdfIn PDF document text
    • https://putajomarope.weebly.com/uploads/1/3/1/4/131437676/9469146.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fibesezati/nirunewitalupof.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/jaxadokegopileroke.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/alloy_metal_list.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/makufasereremisur.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/kezubenasalekokupidopefu.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/altona_p9_college_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/division_problems_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/dna_and_mrna_transcription_and_translation_worksheet.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_off0000e67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67E 4876 bytes
SHA-256: 63a43d95e8798a7578aad3a9423d14e0375e6c8431a2e3f7c5d5aee158985f6e
font_01_sfnt_off0000f708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF708 10080 bytes
SHA-256: 50527e23128dc7d3f4b41419c346bb245976a39f61b35458c05036d21c70746b
font_02_sfnt_off00011993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11993 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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