Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef309de2dcde21df…

MALICIOUS

PDF

75.0 KB Created: 2021-03-19 20:36:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6ecc6d65c7fa33d671e7275f256edcb SHA-1: 1a4c0a59d2d6ce43306224c9f3b076474fb9aa1e SHA-256: ef309de2dcde21df4bc3ae60380c5c7fd9a546f4985e94846cf4002f4bed8bc9
152 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains suspicious links, including one that is invisible and points to a domain associated with malware. The document body, though partially corrupted, suggests a lure related to 'debtors collection policy template' and urgency, which are common social engineering tactics. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest it's designed to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://dafemum.ru/123?utm_term=debtors+collection+policy+template
    • https://static.s123-cdn-static.com/uploads/4485016/normal_5ffd994e0c162.pdf
    • http://marketitaly.info/xadefederitumosaparazm9ipt.pdf
    • http://uscarinsurance.info/12283711174eccc6.pdf
    • http://minuzin.22web.org/pharmacotherapy_handbook_tenth_edition.pdf
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/bufigoramomigekawo.pdf
    • https://cdn-cms.f-static.net/uploads/4486523/normal_6019bca0b4ced.pdf
    • http://managerprogram.live/what_happened_in_rosemary_babyzlyeo.pdf
    • http://rimka.xyz/depomulenipejemuzimuvenouu60z.pdf
    • http://sellamorem.com/how_to_calculate_surface_area_of_composite_shapesg3n06.pdf
    • https://fiwozipuwawew.weebly.com/uploads/1/3/0/8/130814157/rolen.pdf
    • http://pesetatin.iblogger.org/kubernetes_tutorial_espaol.pdf
    • https://rufawakifored.weebly.com/uploads/1/3/1/8/131856207/sujuvu-sazogiwidotalo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d1660744-2ec4-467e-9cbc-c0a0c5b3ec42/is_william_afton_a_real_person.pdf
    • http://mekuroxowu.epizy.com/square_root_fractions_worksheet_answers.pdf
    • http://runisinifozi.rf.gd/kegifetatuvumiwitepil.pdf
    • https://uploads.strikinglycdn.com/files/9f2b8960-820c-4298-8213-882789c6e16d/33796891773.pdf
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_29788a776c8142779b5886b6c741153f.pdf?index=true
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_d120b4c4847f42f7a01549ac5bb658d4.pdf?index=true
    • http://rokodejufoda.rf.gd/bumixozebebulusise.pdf
    • https://uploads.strikinglycdn.com/files/3bd9212e-00f5-447a-8254-ab2d935f5d7b/can_i_do_my_first_aid_certificate_online.pdf
    • https://uploads.strikinglycdn.com/files/4b412d2d-b308-4908-95c3-9b3252d3c006/zujikunume.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_off0000e777.bin
6c5d4fa31989fa14bd6de402d41841d2b3ceb6a5d383271ba71779e5d9f9bdab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE777 5320 bytes
font_01_sfnt_off0000f97d.bin
f7c01336182a794066e9365942931413f7a8cd45a06f790643bd6cdc19297151		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF97D 10736 bytes

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