Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5fa1273f563ef5…

MALICIOUS

PDF

63.6 KB Created: 2020-11-10 13:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6ddb16768b4d99f94fb0c7cdeb50a58b SHA-1: d8d70a766ba3188a50770e4e282218a97d977b53 SHA-256: 0f5fa1273f563ef5ae6918bf38a39811476409fe8eb02bf96c6cac99ff778f7a
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://traffset.ru/strik?keyword=pentair+triton+2+tr60+sand+filter+manual PDF link annotation
    • https://tolafapod.weebly.com/uploads/1/3/4/4/134486806/nikafenemadek.pdfIn PDF document text
    • https://wusinetowaje.weebly.com/uploads/1/3/4/4/134471696/4623181.pdfIn PDF document text
    • https://tokuguzeg.weebly.com/uploads/1/3/4/4/134464653/4072050.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/77959.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/jinabom/43110664249.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/37660789197.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/algebra_1_volume_1_page_71_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/vegago.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/fourth_grade_sight_words_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/nowuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/cemal_safi_kitaplar.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/54590853090.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/roblox_mm2_knife_value_list_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/92398541101.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/western_union_bug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d39a2f-0075-4a1c-a19f-41c044375b6a/watch_longhorns_movie_online_megavideo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e507fb80-71ce-43b7-8d30-b337a0413bd4/66049847681.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/xuxorudetirewebog.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_off0000bb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB6F 5484 bytes
SHA-256: 755c7f5f8042dd631a4a46cff9fa3ee536885c199f20ea568d2e9c85e4c622cf
font_01_sfnt_off0000cdff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFF 10384 bytes
SHA-256: bb2e63309c395b2512512f1595b04fdc7c1386af2784f8b4c07b589cb80b9181

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