Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8786f5899dfd72…

MALICIOUS

PDF

614.6 KB Created: 2021-04-25 02:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 44e68a0f1c06cf03944f726fde399cd1 SHA-1: b2544088a0e4e54b9d81f64c2e62f15dc17aee33 SHA-256: 9f8786f5899dfd729bce83ba499ea5ef7a9d0e4c4c00c78f7bb8832add19ee86
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a visual download button lure and embedded URLs suggests a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and detection points towards a malicious PDF designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6314

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.ofalloncasting.com/sites/default/files/webform/tasuwagorefovufozibojer.pdf In PDF document text
    • http://www.pbttphtk.gov.my/sites/default/files/webform/fadubapep.pdfIn PDF document text
    • https://www.dgs-interparts.be/sites/default/files/bipaxuvimul.pdfIn PDF document text
    • http://pilgrimland.com/sites/default/files/webform/resume-uploads/mikax.pdfIn PDF document text
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/zavemazawutojene.pdfIn PDF document text
    • https://www.enwidth.com/sites/default/files/webform/resumes/22435641867.pdfIn PDF document text
    • https://www.termis.org/system/files/webform/dexifivoneput.pdfIn PDF document text
    • http://spotlight-sites.com/sites/default/files/webform/sizewavajifur.pdfIn PDF document text
    • https://ambrose.edu/sites/default/files/webform/tinijozude.pdfIn PDF document text
    • http://cicatsalud.com/html/sites/default/files/webform/32675510575.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=mushoku+tensei+sylphy+husbandPDF link annotation
    • https://printandmail.princeton.edu/system/files/webform/67925993666.pdfIn PDF document text
    • https://campusrec.princeton.edu/system/files/webform/wawojamifot.pdfIn PDF document text
    • https://www.healthdata.org/sites/default/files/resumes/18848190838.pdfIn PDF document text
    • https://lib.asu.edu/system/files/webform/90369837207.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_016_off00096006.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x96006 17392 bytes
SHA-256: 5ff08e5d3587d7f26923659b61b6afbc3017c5e36821b99804fef1e457031893
font_00_sfnt_off0008c551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C551 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off0008d515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D515 13444 bytes
SHA-256: aeb8ba312097c578270650c67ce52605d66a25e79cf8f4b51b3dc24763db0265
font_02_sfnt_off000900ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x900CE 5144 bytes
SHA-256: cc61a9bd29d340f2acd67ddd6b40cbb41e9bfd8c9cca7e6c27b9aa57948bc837
font_03_sfnt_off0009124b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9124B 1592 bytes
SHA-256: fa5ae873ee41c3d305524eceaeeb1ef4ac03fdf0686b45a08dbc56383d4fff9b
font_04_sfnt_off00091a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A74 26572 bytes
SHA-256: c9ce265a98ea7e300237a8b5a95fda80eecd98bd83363c19f2a66f5383195cca
font_06_sfnt_off000979da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x979DA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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