Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d68f003dfe3621…

MALICIOUS

PDF

111.4 KB Created: 2021-03-26 08:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe5ea43a4b83af4050f042317f18c6b6 SHA-1: 7a9d2a71671b6ba38a94ba9f078b1e1b6223bd5a SHA-256: d2d68f003dfe3621203d6a9e4fe18a8222323dd32ffe8c3e62545914c1b7e251
104 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file. The document body, though heavily obfuscated, contains keywords related to rehabilitation, likely used as a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/award?keyword=spinal+cord+injury+rehabilitation+pdf
    • http://arevakar-travel.com/wazataraloraz0aco.pdf
    • http://miribut.mywebcommunity.org/banksman_signals.pdf
    • http://shop50off.info/cuantos_dias_de_vacaciones_tiene_un_trabajadorhbph2.pdf
    • http://new-volosi.ru/how_to_fill_self_evaluation_form_examplesd885g.pdf
    • http://fepaporipevari.mypressonline.com/candida_en_hombres.pdf
    • http://olipaka.xyz/48217304048mgpwt.pdf
    • http://postel-na-zakaz.ru/leprechaun_coachmen_price99hcu.pdf
    • http://buytoday.cc/intermatic_timer_not_turning_off8u0l1.pdf
    • http://digitalliteracyinstitute.com/cuentos_de_fantasia_largoslbop0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vifusupegiza/38602755753.pdf
    • https://s3.amazonaws.com/tugafebip/how_long_do_samsung_refrigerators_last.pdf
    • https://s3.amazonaws.com/kozibowisenatu/12th_std_tamil_guide_2019.pdf
    • https://s3.amazonaws.com/loneminovu/i_dont_care_what_they_say_song_lyrics.pdf
    • https://s3.amazonaws.com/tudawufed/90s_party_flyer_template.pdf
    • https://s3.amazonaws.com/zumezeviwakiz/69714818057.pdf
    • https://s3.amazonaws.com/fokapikow/tupakus.pdf
    • https://s3.amazonaws.com/woberiz/attachments_rainbow_rowell.pdf
    • http://rogomore.myartsonline.com/kukima.pdf
    • https://s3.amazonaws.com/tanikanaw/naruto_online_bandai_mini_client.pdf
    • https://s3.amazonaws.com/nezanurugega/audio_beats_pro_apk_uptodown.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015f2c.bin
7f967096d64d643437ceb3400081098b31c199026b5bb68e6ca413eccaee9b6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F2C 5484 bytes
font_01_sfnt_off000171d3.bin
e7f65d3f950335eb8280cd5acc7cb01de845de43b66b37fd78502afe0de8fa5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x171D3 11984 bytes
font_02_sfnt_off000199cd.bin
ee0a29113e05e18cc9dd0aa818c1a56c150b8781d6e006ea1e202f9d193b0bc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x199CD 16232 bytes

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