Malicious PDF — malware analysis report

Static analysis result for SHA-256 30906ae608be12e3…

MALICIOUS

PDF

65.2 KB Created: 2021-01-17 22:06:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 04fd81a7b053a7b7d1328ad48adc2b50 SHA-1: a44a7f095541a1b13f4cd0a48c29b50e98cf6ffd SHA-256: 30906ae608be12e3b25288689332f4e75a4476023dfa4b773fafed8fe0f45fe2
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'traffking.ru'. The document body, though heavily obfuscated, contains text related to 'exterior angle inequality theorem worksheet with answers', suggesting a lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a phishing attempt designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/aws?utm_term=exterior+angle+inequality+theorem+worksheet+with+answers In PDF document text
    • https://cdn.sqhk.co/vimanagadu/gihWhde/19613970108.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/GaSieid/ruworagelixid.pdfIn PDF document text
    • https://cdn.sqhk.co/kopizikob/Kgfggsy/night_of_the_full_moon_diaries_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/hp0ghhe/28631079714.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/3EbBgdo/hip_hop_dance_remix_clean.pdfIn PDF document text
    • https://site-1168325.mozfiles.com/files/1168325/algorithm_design_manual_steven_skiena.pdfIn PDF document text
    • https://site-1172684.mozfiles.com/files/1172684/afm_football_manager_apk.pdfIn PDF document text
    • https://site-1172565.mozfiles.com/files/1172565/mini_golf_3d_city_stars_arcade_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vakiduju/42jhXjh/tuwexidotigilozawatek.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/hgDjgPV/glass_tower_world.pdfIn PDF document text
    • https://cdn.sqhk.co/dunokufimove/ii5gdha/84877019778.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dilalixurapa.epizy.com/zezutiguvomatega.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/fewekixexiwuverafero.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/82538780550.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/bonbon_cakery_2._0._2_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/21515020370.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/7225030434.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_off0000bfc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC7 5508 bytes
SHA-256: d68ca8736ab0ba7a464a939a7645d662fcbeeecfba41a5c5786eba53b01fd41e
font_01_sfnt_off0000d278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD278 10864 bytes
SHA-256: 2480455c1f5394d82f9a15083e843ee528f09a8275303edcde83f7bd22f3ee06

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