Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d94ad07f306bc58…

MALICIOUS

PDF

75.0 KB Created: 2021-02-24 02:32:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 63f8640ed131ddc6647197b038eb990a SHA-1: 9e81902e431a9441932f4620c12fe0dc5c2a37d6 SHA-256: 7d94ad07f306bc58cdc895af1f59731b6678167bc1b2c5375d1b256575eb1e05
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to technical instructions. The ML classifier and ClamAV detection strongly support the malicious verdict. No scripts were extracted, but the presence of malicious URLs is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=how+to+factory+reset+hp+pavilion+dv6-3225dx In PDF document text
    • https://cdn.sqhk.co/xenivoronizu/jeeMhrv/idle_scream_park_mod_apk.pdfIn PDF document text
    • http://leadtop.co/adobe_illustrator_cs6_multilanguage_chingliubrory.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/Ihjmdji/40292576571.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/idUibHW/2134506020.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajura/dibjf7p/create_empty_list_in_java_8.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/a3tgjhd/inside_out_and_back_again_minor_characters.pdfIn PDF document text
    • http://dalnoboyi.xyz/scientific_citation_format_generator28t4h.pdfIn PDF document text
    • https://cdn.sqhk.co/lanasido/R4iCtXX/neladozi.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/agguqii/dobepiwil.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/oFUAIii/freeway_closures_58.pdfIn PDF document text
    • https://cdn.sqhk.co/jobolekul/aHZtBjc/c3_mini_snake_camera.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/dGidHic/fall_mens_fashion.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/zoluwivebiro/87089953584.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/specialized_boomslang_platform_pedals_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/86473408593.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/android_root_detection_library.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/dosexuzugeroxisol.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/firefox_portable_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/89743531758.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/56610821908.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_off0000e586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE586 6132 bytes
SHA-256: cc266e8d20054a61d2447b055abc4acb0ea9a3e9d990c68f86cf0d834a712b93
font_01_sfnt_off0000fa8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8C 10476 bytes
SHA-256: 1b26fc40f56886d3cb960b29cc25c4f622cc8cb084238b0a469d2a584b87f20d

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