Malicious PDF — malware analysis report

Static analysis result for SHA-256 283a63f38fdc8b9b…

MALICIOUS

PDF

94.3 KB Created: 2021-03-20 21:16:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c7fa67f25db0c8ed5ff4617b740a180 SHA-1: d56bf25689076591abd9e99a3d2e6c5b3601d5d2 SHA-256: 283a63f38fdc8b9b2efac5415d5b3a6363b378b6bb0a9de89eb985165830cf04
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that lead to suspicious domains, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into visiting a compromised site for further exploitation. Although no scripts were explicitly extracted, the presence of external URIs and the overall classification point towards a phishing lure.

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://resalured.ru/123?utm_term=sentencing+guidelines+assault+s47
    • http://zakosemej.mypressonline.com/gasoragokunelizofijufug.pdf
    • http://pudumalezedokav.22web.org/frog_dissection_lab_report_33a_answers.pdf
    • http://gemajelibetojup.scienceontheweb.net/21561153488.pdf
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/98e7d.pdf
    • https://lewedizo.weebly.com/uploads/1/3/4/6/134610291/c50028b.pdf
    • https://vetigepar.weebly.com/uploads/1/3/5/9/135989985/lefedifosaxo.pdf
    • http://topijakalez.22web.org/ocs_checkweighers_gmbh_manual.pdf
    • http://mazezoda.22web.org/thank_you_mom_quotes_from_daughter.pdf
    • http://dowotezovemalo.mygamesonline.org/bailable_and_non_bailable_offence_crpc.pdf
    • http://gabibaz.22web.org/letter_from_birmingham_jail_quiz.pdf
    • https://werumitepoli.weebly.com/uploads/1/3/0/7/130739038/c52835f123.pdf
    • http://pewadulojuba.mypressonline.com/76276930919.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d5b116aa-e1b6-454a-a65a-ce01f95aab7d/polytropic_and_isentropic_difference.pdf
    • http://fojosotum.myartsonline.com/padma_bhushan_award_2020.pdf
    • https://uploads.strikinglycdn.com/files/79fe398c-86ac-47be-ab3f-afbd2a66bc18/logitech_z623_vs_z625_reddit.pdf
    • http://dutebowoxaj.rf.gd/clash_of_clans_base_app_apk.pdf
    • http://vaguvag.rf.gd/sennheiser_rs_120_price_in_india.pdf
    • http://zijiwaras.onlinewebshop.net/stochastic_oscillator_download.pdf
    • http://zimopup.myartsonline.com/5125134603.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_off00013154.bin
7f76a2fb7fbf91d0cd65cc87f87025972019109bd3fda3a7f6d23c69490ec78d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13154 5284 bytes
font_01_sfnt_off00014370.bin
d796087e30ec74ece0b4dbdee6f25d4cb657f0a5f22bba2a4a968c2cdeb0fe8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14370 11324 bytes

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