Malicious PDF — malware analysis report

Static analysis result for SHA-256 8010f9860753bb9f…

MALICIOUS

PDF

70.8 KB Created: 2021-04-03 01:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2c0e37ab036ae143c28adb3567422e5b SHA-1: 28a418f95f80853ca1a0980eb38a1c466d694c04 SHA-256: 8010f9860753bb9f228fc9d34c5719afbff09381bc08a4137b3277e6869c4403
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a strong phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'auto rotate screen app for android', suggesting a lure to download potentially malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/123?utm_term=auto+rotate+screen+app+for+android PDF link annotation
    • http://fredo.bike/pack_de_texture_boost_fps6ldnw.pdfIn PDF document text
    • http://copyright-notice-ig.com/video_avi_to_mp4_converter_freeidtgm.pdfIn PDF document text
    • http://datingdate.site/vocabulary_word_listuuvaf.pdfIn PDF document text
    • http://moshon.space/fozosaxukewegizavulebekiuooml.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/ditenagopix_mifaf_sadelemufuluji_vejupawuner.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/hid7m2Y/nasesesirun.pdfIn PDF document text
    • http://contact-git.top/cavity_liners_and_basesuqgy6.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/gjcgcfH/car_panic_alarm_sound.pdfIn PDF document text
    • http://fasuxelatiz.iblogger.org/41951122771.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/nadul.pdfIn PDF document text
    • https://cdn.sqhk.co/gurukemopuge/Pmjhvz1/simple_cake_decorating_techniques.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jizivaj.epizy.com/berezow.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/11538395219.pdfIn PDF document text
    • https://86a6be6f-1c3f-48a2-98e5-8a654ddc1212.filesusr.com/ugd/027f51_1112fa3206464703a9a7122d3e2ae715.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/sanyo_vcr_codes_for_universal_remote.pdfIn PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_674b8a48879d40f8a38daea405a84b9a.pdf?index=trueIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_7b4b1221bebb46e9baf89795e86e2b7d.pdf?index=trueIn PDF document text
    • http://xebowuruno.epizy.com/school_schedule_template_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/the_importance_of_being_earnest_2002_synopsis.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_off0000d93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93E 5104 bytes
SHA-256: d3cdcd7e150959ea040cd226d79525f8f29ca96b9d4cbc0c9fcf3f4857042154
font_01_sfnt_off0000eaac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAC 10372 bytes
SHA-256: 5b8afe99f91466a4f867332bca74cdaf4f9488d4601d642c3d4e122f21321ecf

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