Malicious PDF — malware analysis report

Static analysis result for SHA-256 2278506445e8cd7c…

MALICIOUS

PDF

76.5 KB Created: 2021-04-06 19:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c7f07b2dbd29ace2245c617c8ddb97a SHA-1: 7d7b9a16ef28aceb27643423010391114eca69f1 SHA-256: 2278506445e8cd7c31d0d9f57f4e558378646525a801929c0847455360c1f68b
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL that appears to be a lure, suggesting a phishing or social engineering attack. The presence of embedded URLs further supports this, with one pointing to a suspicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/strik?utm_term=how+to+enter+into+the+courts+of+heaven
    • https://cdn-cms.f-static.net/uploads/4410459/normal_603808984db68.pdf
    • http://moscow-siberian-force.online/bakirizosewilugukl7r56.pdf
    • https://cdn.sqhk.co/pixefavenar/byhfic6/tefisafazevewepakugimel.pdf
    • https://cdn-cms.f-static.net/uploads/4386591/normal_602bed2ac7351.pdf
    • http://center-about.com/bhai_bhai_1970_movie_songsekjz2.pdf
    • https://cdn.sqhk.co/silutoge/Znfigd0/twin_platform_bed_frame_with_headboard.pdf
    • https://cdn-cms.f-static.net/uploads/4446490/normal_606a13f96796e.pdf
    • https://cdn.sqhk.co/lazujanaziri/4geghih/pumizujutesino.pdf
    • https://static.s123-cdn-static.com/uploads/4421208/normal_5ffe6c75379fe.pdf
    • https://cdn.sqhk.co/tabewinudeka/fm5Bhbf/fexomeranununapeti.pdf
    • https://rivodufut.weebly.com/uploads/1/3/4/3/134369250/ad9b620312.pdf
    • http://levelupguild.com/71564059045x2ro0.pdf
    • https://static.s123-cdn-static.com/uploads/4494669/normal_5ffa83608bb8d.pdf
    • https://cdn-cms.f-static.net/uploads/4380545/normal_6013428d064a3.pdf
    • http://jakijofuvi.iblogger.org/87768008760.pdf
    • https://rofekituluz.weebly.com/uploads/1/3/2/3/132303072/watosizur-fipewoz-bojenik-fowudolani.pdf
    • https://cdn-cms.f-static.net/uploads/4455684/normal_602d790f7c8df.pdf
    • https://cdn.sqhk.co/sunomedude/hjb9Wjh/off_road_racing_series_rc.pdf
    • https://cdn-cms.f-static.net/uploads/4405641/normal_601ae150e4e33.pdf
    • https://gogukosujupubof.weebly.com/uploads/1/3/5/3/135317205/7300764.pdf
    • https://kudarori.weebly.com/uploads/1/3/5/9/135960502/b7b691a9211c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xujalebarot.epizy.com/wanted_bhojpuri_video_song_3gp.pdf
    • http://zefobik.epizy.com/83534450366.pdf
    • http://duvexarido.epizy.com/melenimet.pdf
    • http://kemetosope.epizy.com/2007_jetta_2.5_transmission_fluid_change.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_off0000ec0c.bin
22d1dfcd2ed36107bda1d119f12e37cad1d4dca25c388346e5880881e706e9e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 5052 bytes
font_01_sfnt_off0000fd4c.bin
e4847fb525bcc6117e870e95742f87178ddaa5ffe43985ef5de181f3560b9df5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4C 11044 bytes

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