Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c61970dc2934fa5…

MALICIOUS

PDF

102.6 KB Created: 2021-06-09 03:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 76701c68f3b907cc61575c26ea06c7f0 SHA-1: db80538ee614b130aed7b97d9143de1077af0fd2 SHA-256: 6c61970dc2934fa59bf8b61ebfe3fb952d0d42e1c5ac72be692b801e765cb45d
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised WordPress sites, suggesting a phishing or credential harvesting attempt. The document body, though heavily obfuscated, contains text related to an 'Ethiopian passport application form pdf', likely a lure to entice users to download the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://chcial.ru/uplcv?utm_term=ethiopian+passport+application+form+pdf PDF link annotation
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/394a1d4b0481d76a882044dc434b4a9a/25790210036.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/7291173342.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b772f154584---godogagamen.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/wimegapudozunamavadisifa.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/16882847218.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/51384700972.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160ba339588329---nijuxiki.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/7njvhg8pueelnvqn4nepflo48l/raxorovupoxo.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/77170538246.pdfIn PDF document text
    • http://ridendo.cz/files/file/xigawomematojimiligib.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/vlrgob46t78f8119s1h1n58ia6/madivajixibejupemeno.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/7cbee1869223ca4e101470adecd713c1/82984661973.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/qfgfosuguespaske0s72hagn16/77271876350.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3ee27f811---46074880386.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4ccc0a6fb---89755587710.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160800499568a4---judiwodimu.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/295ad0cc6595ac6a69f9c2e4fb0b9822/dekimemeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000149bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149BC 5352 bytes
SHA-256: 9ceede3265b1de27983262d1497159b71d49419fdd19d7e667d5ee7fc620fea3
font_01_sfnt_off00015bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BBC 2344 bytes
SHA-256: fe8a941116f5258addd35d874fb4b556c1bd813a3383d0eda5e279f21a6417dc
font_02_sfnt_off000165c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165C4 11620 bytes
SHA-256: 012965ccffa666e4224c0f297286cd415e6479bcaba022e6741e45f08ef5360a

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