Malicious PDF — malware analysis report

Static analysis result for SHA-256 c79155070044bfec…

MALICIOUS

PDF

74.0 KB Created: 2021-04-12 10:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b52e243bf814da7b1dd08a9af09ea93 SHA-1: e26526588f12632df7c2ae1e664c75b572751b2d SHA-256: c79155070044bfec205393fe59a8b07536ee38f8b6f92baa925df49f38f36eae
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 host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to sociology, likely to trick the user into clicking the malicious link.

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
  • 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://vilenefex.ru/strik?utm_term=the+disappearance+of+childhood+sociology
    • https://wosubazaroden.weebly.com/uploads/1/3/0/8/130813518/tonukogiluvaf.pdf
    • https://lowunidedalovel.weebly.com/uploads/1/3/1/3/131380213/0254ecd3.pdf
    • http://wonuwomola.iblogger.org/fobolinarufa.pdf
    • https://povilaromegew.weebly.com/uploads/1/3/4/4/134486615/luvew.pdf
    • http://gejokakop.mygamesonline.org/32071039884.pdf
    • http://nipawifaxupus.mygamesonline.org/solosumiteko.pdf
    • http://novijixonusasu.mywebcommunity.org/96509032984.pdf
    • https://begazasageb.weebly.com/uploads/1/3/1/6/131637419/jigokatixe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vavabi/61257904983.pdf
    • https://uploads.strikinglycdn.com/files/75929351-ca36-4743-99b9-fccfeb439c8a/sundance_spas_model_sentry_750_850.pdf
    • https://uploads.strikinglycdn.com/files/d1fc5f59-ab4c-40f8-8c9f-52930af5ab94/20008881936.pdf
    • https://uploads.strikinglycdn.com/files/b74601a0-b327-4eb7-9e9e-ee084304651e/kijilepisurawasonagudole.pdf
    • http://kamigawox.atwebpages.com/biological_wastewater_treatment_henze.pdf
    • http://gofirog.epizy.com/arrive_guidelines_reference.pdf
    • http://sitesiku.rf.gd/sabetejemerefixebalitipew.pdf
    • https://s3.amazonaws.com/zowibatev/feratebozetafuxa.pdf
    • https://uploads.strikinglycdn.com/files/d04e9456-4a37-4642-be0f-6052e04bc162/what_does_mean_in_python_programming.pdf
    • http://pekowob.onlinewebshop.net/wepaziw.pdf
    • https://s3.amazonaws.com/gozifep/6765863969.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e446.bin
7919e0baa53cb23fd27fd16b53bb398b8cf3db5eb65876ba8bebea453ab7bb87
pdf-font-stream PDF embedded font (sfnt) at offset 0xE446 5468 bytes
font_01_sfnt_off0000f6e2.bin
67cbbb49313e315355f256ae0e1938da6b2b3d573c3d68cfeb331373cd5f33e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E2 10464 bytes