Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a704ae04cfea223…

MALICIOUS

PDF

92.1 KB Created: 2021-02-16 18:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8e54f1313cb5fdba18fdc87290d6349a SHA-1: 763c2e641434bbc0ee83b1054de0e4a14e395b94 SHA-256: 0a704ae04cfea2236f856ec1d17fd033251a3c0d4e108626153fb2f08ed86e2d
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The embedded URL is used to redirect the user to a malicious site, likely to deliver a payload or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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+replace+battery+in+nixon+corporal+watch In PDF document text
    • https://cdn.sqhk.co/vefusujix/jfWdtgj/file_manager_for_iphone_4.pdfIn PDF document text
    • http://bestsalestoday.xyz/amantele_trecutului_onlineajtxz.pdfIn PDF document text
    • http://skidki-day.site/asfixia_perinatal_gpcwiefs.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/cas_pratique_corrig_droit_du_travail_l3igykp.pdfIn PDF document text
    • http://urro-hu.com/nfc_14-_100y1cj8.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/gfK0Yhe/56259603375.pdfIn PDF document text
    • http://drilltech.info/bauman_amor_liquido_espaol8382d.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/heKF9gU/76492213552.pdfIn PDF document text
    • http://mushygushysayings.com/profits_in_the_stock_market_harold_m._gartleyeepup.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/TlNO5hi/xojij.pdfIn PDF document text
    • http://redtea.space/how_to_add_braava_380t_to_irobot_appb0dg3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/excuse_letter_absent_format.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/periodontitis_apical_asintomatica.pdfIn PDF document text
    • http://sasaroguri.rf.gd/pagotisubegemo.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/banished_bbc_parents_guide.pdfIn PDF document text
    • http://zexukojol.rf.gd/cafetera_dolce_gusto_melody_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/29029950499.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88B 3076 bytes
SHA-256: 846bad35580dabf0cde73bfda84bad59486174de6e3e97ba2eb656b75b670860
font_01_sfnt_off0001037f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037F 4996 bytes
SHA-256: 05a2b04c903b4e6eb7c1cef5060e958717a9e532d7be01b2969419ff6d6529c9
font_02_sfnt_off0001147a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147A 12664 bytes
SHA-256: 930e71308dccfabe15b3b2750202141caeca9393c5ff797027f4e748860d77ca
font_03_sfnt_off00013eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAF 16132 bytes
SHA-256: 6c511cd2548aab1566dad8f54fccf2be4cd056cf5a4d5d56937977fde9165995
font_04_sfnt_off000153a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153A2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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