Malicious PDF — malware analysis report

Static analysis result for SHA-256 1826fcde70199b64…

MALICIOUS

PDF

83.2 KB Created: 2021-04-27 09:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 797b976af7d67d0d991c2193bd0631c3 SHA-1: 7b483b12d31910203828c2e12b57c8259e57072e SHA-256: 1826fcde70199b6402dc3adfc06b256eda7d7fb7a6dc156d459b33e44edd8932
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=neato+robotics+d602+connected'. This indicates the document is designed to redirect users to a malicious site, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://yafferge.ru/strik?utm_term=neato+robotics+d602+connected In PDF document text
    • https://cdn.sqhk.co/jukowejazus/hhgjBgi/76670312514.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/ljfbwid/letisewaras.pdfIn PDF document text
    • https://cdn.sqhk.co/jifedibodo/7ggw8va/piano_keys_labeled_with_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/cTifgz2/36008565594.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427104/normal_5ff601bd7f61d.pdfIn PDF document text
    • https://cdn.sqhk.co/govulasem/vidYLiV/cake_decoration_and_sugarcraft_competition.pdfIn PDF document text
    • https://cdn.sqhk.co/kesumixom/aBjfjaJ/who_moved_my_cheese_book_review.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/hjid9gi/zepenavibazaguviratusigof.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/fKghvhh/arizona_blm_shooting_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427506/normal_6058094c9db5f.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/SihNYhc/wamosajubonuranokokizu.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/dijhzhc/lock_screen_shortcut_iphone_x.pdfIn PDF document text
    • https://cdn.sqhk.co/zezovajav/dihxjjb/z_nation_review_ign.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/vojapu/11505780355.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/37232294217.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/what_does_g_shock_stand_for.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/barifisikumokasonuvoleno.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/72774400382.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE288 5436 bytes
SHA-256: f4721afdd2a2cd093efff035fe8e619d82dcbcedad7f1c5d6d7339dc3d00e27d
font_01_sfnt_off0000f509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF509 2528 bytes
SHA-256: fe2123dbee4b7bf8755342d2f8fb97f76f6a70077f8b9fc3a8343a1737165214
font_02_sfnt_off0001003a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003A 12876 bytes
SHA-256: faefbe73e5a1657f5569a8d954048296366d541fcea5b5582331c370ee0265ff
font_03_sfnt_off000129b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B7 16296 bytes
SHA-256: 6a9a6750a1f020900cf06996199e53204e7cc94092ec82a47bebb9eef8d1c96c

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