Malicious PDF — malware analysis report

Static analysis result for SHA-256 c596769546554cce…

MALICIOUS

PDF

88.5 KB Created: 2021-03-24 18:57:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a6f9281e62d8199625762012053f7a2 SHA-1: 23f7071cf7565c2fda519bd74bedb3b1aa6034a3 SHA-256: c596769546554cceea8779bed57ebde102fbeddc093b50ca0fef86e53bce9d20
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains keywords related to the URI, suggesting a lure.

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
  • 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://jumiwimov.ru/123?utm_term=bruce+jenner+before+transformation
    • http://homearfes.com/http_android_go_edition_phones_in_nigeriar26kq.pdf
    • http://startask.ru/ziwejizusinijitenukc7nsf.pdf
    • http://ninotekega.mygamesonline.org/earn_money_online_legitimate_ways.pdf
    • http://allostar.buzz/masezugekonilisaluvolom9duvz.pdf
    • http://noxogejukebe.mypressonline.com/runoz.pdf
    • http://zespodsvetkoy.site/how_do_breathing_exercises_workdzven.pdf
    • http://tiwujatujoput.mygamesonline.org/access_consciousness_libros.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5f888b04-aa05-4a0e-b375-0b0f53a2b1d2/how_much_does_a_windscreen_replacement_cost.pdf
    • https://s3.amazonaws.com/zurovajij/semariribetulivamu.pdf
    • https://s3.amazonaws.com/kotodur/ingenuity_inlighten_cradling_swing_not_swinging.pdf
    • https://uploads.strikinglycdn.com/files/7a9866c7-9d24-48ee-a2f7-004eba84225c/conair_weight_watchers_body_analysis_scale_reviews.pdf
    • http://jidodurej.epizy.com/66085901798.pdf
    • https://s3.amazonaws.com/bikikanafopavu/58333270751.pdf
    • https://uploads.strikinglycdn.com/files/da5b4470-557c-48b3-8bfb-3ec7f0e1f6e3/zifijowunusimuragejamabe.pdf
    • https://s3.amazonaws.com/sefabe/16025854370.pdf
    • http://mojogoralil.onlinewebshop.net/69560402114.pdf
    • https://uploads.strikinglycdn.com/files/f18ac125-bd17-40df-8c80-9ce96e5b0779/what_does_a_50_year_old_woman_want_in_bed.pdf
    • http://kokutefuto.epizy.com/delegodad.pdf
    • http://ximuxulizi.myartsonline.com/onkyo_tx-sr604_hdmi_problem.pdf
    • http://gopogawamo.rf.gd/tivuw.pdf
    • https://s3.amazonaws.com/vavejijitatofu/ted_talks_guide_to_public_speaking.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001131d.bin
596c91c15b6245b24b53c5833b359ef5b6c6c3350218f911d28a35311c54654e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1131D 5260 bytes
font_01_sfnt_off000124e9.bin
4fdbe022b111ee898fe27fd94167615cf41b34200ed6b9ab62f25051806b7a32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124E9 1928 bytes
font_02_sfnt_off00012e28.bin
c5c5081fc426c5ad1ba4c01cf6400677167b2617ee1ab900067f393623ca6f05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E28 11384 bytes

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