Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b3c6ab63892d836…

MALICIOUS

PDF

91.2 KB Created: 2021-03-21 00:08:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 967fb0fda2f6a09f7fc1b9f9a56ef473 SHA-1: 95d6e4d986a22f06930cc98b57a9eb99bc897256 SHA-256: 7b3c6ab63892d8367d787b76ca64d4b82f8e008aa469161ad65304355b9615fb
156 Risk Score

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-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.
  • 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://dugedepap.ru/strik?utm_term=pleasant+hearth+1750+sq+ft+pellet+stove+reviews PDF link annotation
    • http://canonsburglake.org/dungeons_and_dragons_character_sheet_doc42kgt.pdfIn PDF document text
    • http://pl50off.info/life_experience_vs_education_quotesf6c03.pdfIn PDF document text
    • http://madewithsunshine.com/jesse_tree_ornament_patterns_free39ytf.pdfIn PDF document text
    • http://repochka.site/core_java_se9_for_the_impatientoi78z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_e3b95062dcb342d2a13c5497825c524b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/747527606.pdfIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_1cfad73e555b43d1a05b16992d000a22.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/logamomewajo.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/balfour_beatty_financial_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/35817935653.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/befufinujupagugogavub.pdfIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_eceedbd3043a4c1695a38f796ccf9bbe.pdf?index=trueIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_a8050ae09f2347cfb6c8a3d2ac478940.pdf?index=trueIn PDF document text
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_e4c5c7d9386744208948c1d0410f29c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/21863364028.pdfIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_0c21e6dda67e46bc9e16e2d6737b6782.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pidufozu/gta_5_heist_crew_guide.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_c16e0a0f3b76487896b8268a9b173261.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitozi/82435992022.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/2774608777.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_off00012579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12579 5668 bytes
SHA-256: eb946ee6232583e6d854cb23797bcd1e834f10f65c412a2531194b8def028d08
font_01_sfnt_off000138e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E0 11252 bytes
SHA-256: 14c52d930a0aaa23458ae5cbf1cb79ad16f30341ef1206ff3fdeae20ca1e7e0e

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