Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc7cc277598096f…

MALICIOUS

PDF

104.3 KB Created: 2021-03-13 21:28:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 505186cdcf9b5e36e13b0066d6614adc SHA-1: 5e6db2521b2cb1629674a6041dfad6756a895840 SHA-256: 9fc7cc277598096f7a8ab3b3c2bfb30afa992f2d2a51f58323cdc5d341b48831
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs pointing to external resources, suggesting it's designed to redirect users to potentially harmful sites. The presence of PDF-specific heuristics like PDF_URI further supports the attack pattern of luring users via external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/wix?keyword=burn+notice+wiki+victor
    • https://cdn-cms.f-static.net/uploads/4486197/normal_6010626e904bc.pdf
    • http://wobafobigo.mywebcommunity.org/werorosemapafonafoj.pdf
    • http://nageramuvepom.mywebcommunity.org/57929153527.pdf
    • https://cdn.sqhk.co/limizolaxa/oThiggD/1529617943.pdf
    • https://giruwaferelesed.weebly.com/uploads/1/3/4/8/134850821/mudotef-kurisiwedemipi.pdf
    • https://cdn-cms.f-static.net/uploads/4381104/normal_603d0afaf1032.pdf
    • https://cdn.sqhk.co/dofewijoras/Tgcdwhb/sam_ur_eye_unblocked.pdf
    • https://static.s123-cdn-static.com/uploads/4449185/normal_6001d771c105d.pdf
    • https://bugotenopiziwa.weebly.com/uploads/1/3/0/9/130969298/4098447.pdf
    • https://cdn.sqhk.co/dewufidabo/C7ieiiM/granny_chapter_two_mod_menu.pdf
    • https://cdn.sqhk.co/fodibaniwe/igjjVgi/idle_construction_3d_apk_para_hilesi.pdf
    • http://bomepufibawil.scienceontheweb.net/69459533962.pdf
    • http://bebetadiruj.mywebcommunity.org/el_abc_del_aprendizaje_cooperativo.pdf
    • https://cdn.sqhk.co/tixuniwe/eTPibhi/80100785380.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pesetufavo/how_long_does_it_take_to_fall_in_love_scientifically.pdf
    • http://foxukekamusun.onlinewebshop.net/76340464962.pdf
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_12f0c25465f640f2bf44f0465740c38b.pdf?index=true
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_97d48757bd8e486db295765896239d7c.pdf?index=true
    • https://e1cf253b-b3af-4135-a675-1c3c021177f9.filesusr.com/ugd/111c46_54ef17195d9b47ff9deaecbed1245620.pdf?index=true
    • https://s3.amazonaws.com/loxopudizus/mepeveripunibab.pdf
    • https://s3.amazonaws.com/jokotaziweluge/34301297374.pdf
    • https://s3.amazonaws.com/gopuze/92219527939.pdf
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_19a00a37c9e64ea2a88fa809107b666f.pdf?index=true
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_1de638a73cbb4e608c0e2e7a39efea92.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015d42.bin
d19e8a629d2821f5ac0c0244639aaa0df62caf91972ab4c7175ca61f987f6b54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D42 4636 bytes
font_01_sfnt_off00016d39.bin
a78efa8dcf1dad409210f86466fd8042947edfc3c54238e0c075be40735e9b02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D39 11304 bytes

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