Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc1d86ce1753bb1…

MALICIOUS

PDF

76.8 KB Created: 2021-04-23 07:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 021301bd43e50c7eaba7df1677c25162 SHA-1: baa2332d3b419e3a0a70c85316d6a4007061a455 SHA-256: 1dc1d86ce1753bb1f3f5cae73a4baff9eafebd27243555d73e471b4bd72aaaf2
104 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. It contains an embedded URI pointing to 'https://seumenha.ru/strik?utm_term=lifesmart+hot+tub+control+panel', which is likely a phishing or malware distribution URL. The heuristic 'SE_URGENCY_LURE' suggests the document content attempts to create a sense of urgency, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=lifesmart+hot+tub+control+panel
    • http://robinmani.site/583823177827ba37.pdf
    • https://cdn-cms.f-static.net/uploads/4485445/normal_604d225088e88.pdf
    • https://cdn.sqhk.co/tubafejog/9LTXgc1/sotosikabavewebomupasikez.pdf
    • https://cdn.sqhk.co/pijajawopoji/3gfXaid/83635852563.pdf
    • https://cdn-cms.f-static.net/uploads/4377909/normal_60514c98685c8.pdf
    • https://cdn.sqhk.co/pepupiribojo/ijjcGGI/ringtone_maker_for_iphone_8.pdf
    • https://static.s123-cdn-static.com/uploads/4494875/normal_5fe030eb1362b.pdf
    • http://sosyaltakipcipanelin.com/can_i_get_premiere_pro_for_freeiy6h9.pdf
    • https://static.s123-cdn-static.com/uploads/4413019/normal_5fc8c66de788c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gixawetopoli/hoover_windtunnel_vacuum_repair_manual.pdf
    • https://uploads.strikinglycdn.com/files/ff7fb02c-974d-4a2a-9c67-4b8d1d330cc7/keurig_b60_reset.pdf
    • https://uploads.strikinglycdn.com/files/f83e3be0-676c-48b6-ad21-315b18047a2f/albert_einstein_atombombe_wikipedia.pdf
    • https://s3.amazonaws.com/rizoli/why_wont_my_heater_turn_on_in_my_car.pdf
    • https://uploads.strikinglycdn.com/files/5770efcc-e591-4924-929c-7c19d7390993/top_5_manual_tile_cutters.pdf
    • https://uploads.strikinglycdn.com/files/c3c36a56-8f55-45e8-9a4a-58c7a2f8c625/82385686049.pdf
    • https://s3.amazonaws.com/bolovopizonuki/hard_indices_questions_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/8c517811-049a-44c5-a4ce-eaf53fa57b07/cuanto_es_150_gramos_de_avena_en_tazas.pdf
    • https://s3.amazonaws.com/wixatax/cardiomegaly_treatment_guidelines.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_off0000ee65.bin
280c4e7f8345bcd1c78f33c50e0a2b935fa5a6b888d65327cd348db8f0e676cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE65 5336 bytes
font_01_sfnt_off00010062.bin
7e6054f6f87efa0b11b821df1a1f131ff8b7527f92892797e77a7f56e09608a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10062 10912 bytes

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