Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc8616c31fd901c…

MALICIOUS

PDF

72.2 KB Created: 2020-12-03 00:10:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8f12b52a00ba3f4b348536e546de2581 SHA-1: daf239a79d2260aa8cb1e4946f4c50e101a77287 SHA-256: 8dc8616c31fd901c9d2d9b7c70892fc0a9f4b4f424c55db17e561c604da5ec9e
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://trafftec.ru/123?utm_term=boy+scout+camporee+packing+list PDF link annotation
    • https://zodosixuwe.weebly.com/uploads/1/3/4/8/134863902/8540064.pdfIn PDF document text
    • https://fapovodulutob.weebly.com/uploads/1/3/4/3/134361236/a1eb186e6.pdfIn PDF document text
    • https://punadojum.weebly.com/uploads/1/3/2/6/132680976/gomeliko.pdfIn PDF document text
    • https://totamozosapopa.weebly.com/uploads/1/3/4/7/134712517/difurowisaneg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414689/normal_5faa790e15769.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/8170088.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/woxojuxafopuv/dilawezixuxenawisuvuri.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd06e33ca23154c95cb3af/1606223587402/best_12_volt_air_compressor_australia.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dc532e34347c7043ce2c/t/5fc80f7a8f408a487d171e4b/1606946683655/top_programming_languages_2020_stack_overflow.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/13224191841.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/awadhesh_premi_new_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/transition_mathematics_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f58b2cf09257bd796827/t/5fc38d9e145a8629dc1e77b1/1606651298950/lesson_3_the_revolution_begins_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/b6f_karyotype_worksheet_answers.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_off0000d4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DF 5468 bytes
SHA-256: bb2dee250801fdde87c1010c68d617cf250dcfdd8ca351b032b416b8d2949061
font_01_sfnt_off0000e76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76D 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000effb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFB 10472 bytes
SHA-256: aa0b69a19e8b65ea7fd16d04be48c6f6dfab9398493c270d969d0a37cd6a3d55

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