Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf6a3f09d9a2130…

MALICIOUS

PDF

76.8 KB Created: 2021-03-24 17:31:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ef0659ae2f5607211254ac14c2c79b8 SHA-1: 5024d17705c295ac053bf0697940379303f3e38a SHA-256: cdf6a3f09d9a2130612d8a8b15af4813a996622b4e1c54ac8ffb7bb43a38773f
104 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, specifically identified as Pdf.Phishing.Trojan. The presence of an external URI pointing to 'lozipotod.ru' and the heuristic 'SE_URGENCY_LURE' suggest a phishing attempt. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to facilitate malicious actions like downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://lozipotod.ru/123?utm_term=resume+templates+online+free+printable
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5fd5fcd279e27.pdf
    • https://static.s123-cdn-static.com/uploads/4447903/normal_5fffab91e70ce.pdf
    • https://static.s123-cdn-static.com/uploads/4387581/normal_5fffb6785fa4b.pdf
    • https://static.s123-cdn-static.com/uploads/4379839/normal_5ffaa1710532a.pdf
    • https://cdn-cms.f-static.net/uploads/4425484/normal_602ebf49d8212.pdf
    • http://idealslimitalia-ufficiale.site/bandura_self_efficacy_theoryg3ku7.pdf
    • http://mercelus.xyz/nozafabamukixuzo451q2.pdf
    • https://static.s123-cdn-static.com/uploads/4481286/normal_5fc88eb4a9920.pdf
    • https://cdn-cms.f-static.net/uploads/4426269/normal_602a5a9a93be2.pdf
    • http://hookup154.online/hp_elitebook_folio_9470m_price_in_nigeriav9pti.pdf
    • https://static.s123-cdn-static.com/uploads/4376127/normal_5fe3b7b1eea73.pdf
    • https://static.s123-cdn-static.com/uploads/4473432/normal_5ffa4ddb99f35.pdf
    • https://cdn-cms.f-static.net/uploads/4407100/normal_6015c8b4e6ae0.pdf
    • https://cdn-cms.f-static.net/uploads/4404753/normal_60541667a0f2a.pdf
    • https://static.s123-cdn-static.com/uploads/4480755/normal_60017ee1b332a.pdf
    • https://static.s123-cdn-static.com/uploads/4384484/normal_6007b60b291e3.pdf
    • https://static.s123-cdn-static.com/uploads/4369648/normal_5fcdfb42f25cc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6d74ca26-770e-4463-abbe-c47b027147e3/79722304442.pdf
    • https://uploads.strikinglycdn.com/files/cae56105-d73f-4119-b533-3a24baf4011c/dekowezuwawobosilobubax.pdf
    • https://uploads.strikinglycdn.com/files/3784d973-bd34-4858-8db9-50ed2499d636/how_to_reboot_verifone_vx510.pdf
    • https://uploads.strikinglycdn.com/files/fd9f2361-dc52-4619-b7dd-f7bac735a526/the_selection_by_kiera_cass_movie.pdf
    • https://uploads.strikinglycdn.com/files/13c70403-c092-4c81-ba53-f3225cc26be2/zutivuwizinotibokigusujuf.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_off0000ee9c.bin
0fffe0853715998074cd2dd360ef58b2ffb5ad92c70adc3026caedccdf7102e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9C 5196 bytes
font_01_sfnt_off0001002d.bin
745c09d3181256cbd865fb67b1059aad6ae0505fa20deeab1ffed9c1b25fde68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1002D 11116 bytes

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