Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f3c8268178d3b9c…

MALICIOUS

PDF

74.3 KB Created: 2021-02-13 16:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec16a0e0ec9bca31f2e7ce7a72d482c7 SHA-1: 7fdf4fa3ce823ad9e4a13ade1e3f6687a0dfe249 SHA-256: 3f3c8268178d3b9cb4c3e43c74ae0d0b066672b8f4b5c1bdaa71f3f14a81faa5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other free hosting services, indicative of a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://maypoin.ru/wix?keyword=star+wars+kotor+2+character+influence+guide
    • https://rolobidixogiru.weebly.com/uploads/1/3/1/6/131637372/1604cd1c.pdf
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/matefarovazi_kerotizuv_nomeguz.pdf
    • https://xofebigile.weebly.com/uploads/1/3/0/7/130739964/8646870.pdf
    • https://topasotasakaro.weebly.com/uploads/1/3/0/8/130874498/7259807.pdf
    • https://luxoxika.weebly.com/uploads/1/3/4/8/134899107/12d1ad8fed779df.pdf
    • https://mafoxoluz.weebly.com/uploads/1/3/1/4/131483222/895094.pdf
    • https://jowufawogutezob.weebly.com/uploads/1/3/0/9/130969037/robibofeduw.pdf
    • https://sesogipe.weebly.com/uploads/1/3/1/4/131438268/temifabepoli.pdf
    • https://rejovofutilux.weebly.com/uploads/1/3/1/4/131484728/f776d2817.pdf
    • http://fozujam.iblogger.org/tifobeferisipegizunefuje.pdf
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/0e307ebaab88.pdf
    • http://nomanodix.iblogger.org/loketiletikiwidijig.pdf
    • https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/6715230.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xujitezu/cydia_software_free.pdf
    • http://wavemidafezan.rf.gd/movies_free_online_direct_link.pdf
    • https://s3.amazonaws.com/sigobija/womed.pdf
    • http://povemuxituziv.epizy.com/sakhi_audio_songs_naa.pdf
    • https://s3.amazonaws.com/tutasujal/reading_comprehension_worksheets_esl_free.pdf
    • https://s3.amazonaws.com/lijulijowivaze/71285646398.pdf
    • http://kojodidekojamu.rf.gd/barometro_de_las_americas_2017.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ad.bin
e8a694664d28219dffcf24da33f5a30470aec2f53eb76e384429ffa5b5e85684		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AD 5676 bytes
font_01_sfnt_off0000f913.bin
7729d44a5ca01c16b47b8c434e51c56271ac75006a7144753e016e9333569ddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF913 10088 bytes

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