Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86d1108129913d9…

MALICIOUS

PDF

127.2 KB Created: 2021-01-26 03:24:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ffa6dbb1aba51d443224f06699b3c9ce SHA-1: 6099cfa8341c6bac02bd03d07f32b17b546b22e7 SHA-256: d86d1108129913d927f9820c32db0e79537d2d7e45e989dc975defa864223ec5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with at least one pointing to a suspicious domain ('trafficel.ru') and others hosted on dynamic DNS services or cloud storage, suggesting a phishing or malware distribution scheme. The PDF structure itself is also flagged for duplicate object bodies, a common obfuscation technique in malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/123?utm_term=ciel+black+butler+age PDF link annotation
    • https://cdn.sqhk.co/bixatavafut/jgKymzu/kodefudinalavotaf.pdfIn PDF document text
    • http://esmoney.site/baxusafonetatod0z0ej.pdfIn PDF document text
    • http://jokebixa.22web.org/burlesque_performance_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/bibolaned/ggjdWgf/hydro_dip_film_kit_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/hdgd9cm/cute_doll_wallpapers_for_facebook_profile_picture.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405409/normal_5fd3511c32e3e.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/bbjjhem/retro_space_shooter_games.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/sowirutelevolur/january_2019_calendar_free_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/89248146504.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/app_cache_clearing_android.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A2E 9128 bytes
SHA-256: 57c6bfd853fdf731a8b7a81fa6833ea596f8587ef69866e5af734e4d8ccd39f5
font_01_sfnt_off00019799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19799 4900 bytes
SHA-256: fb29469216483c569977095a34eec21d2591a7c2d3819dd38386c5f849a7f1ff
font_02_sfnt_off0001a84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A84B 1892 bytes
SHA-256: c4ebf9374f183e0d06abff076368f9778f5420368af1f3cb29c6cd45b472c97f
font_03_sfnt_off0001b16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B16B 12340 bytes
SHA-256: 921bcc79248fad1981020513100df6f0d1b6547743935c3b2600bfdc1191899b
font_04_sfnt_off0001d9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9DE 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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