Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea396bba4af536f0…

MALICIOUS

PDF

87.1 KB Created: 2021-09-05 00:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f321590e17e1348757510f1c072a84f7 SHA-1: 8a049ef6de87cd112544422432bbed5cff9120fa SHA-256: ea396bba4af536f0c6fb71160b4368a0486a312980e17fda587962d455ae337e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to obscure the final malicious destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://drosamahetta.com/userfiles/file/texikeselekebemigufik.pdf In PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/i4a9v18rnjgrg3vjhbac69iaf2/tizokifog.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/mugexuwasoganironepa.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/72179951982.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/77350245678.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/juwita.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/fa2e3789796c5f06a98952d6a3d43fa4/1918374427.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/qr6q2jc63oc59tl6gipidabg74/xanixuguxumizojanavi.pdfIn PDF document text
    • http://360global.ca/userfiles/file/82774633926.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/139a0ee08462d010fc492f259f591c12/xidonitalovegevoxuxufax.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608757bd325f8---41135931858.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/92285824515.pdfIn PDF document text
    • http://vanxuantravel.com/upload/files/93752431760.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/78375999096.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad867759e9---lodolidaduvo.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160dfb8e3f033c---kemobupuzalugixigew.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/piwuvufegilukanamuboxovi.pdfIn PDF document text
    • https://robertbah.si/files/file/monatezalifomutituwuzupaw.pdfIn PDF document text
    • http://novichiha.ru/pic/file/15148888842.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/zixitawedivej.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/8f7480e645e18bf0d77f4ed9f3916f45/xajigetinapepujutakejoven.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ga2pibt0slol6itjmshlin5gq2/nuvaxa.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/vixugalepelo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=ghatna+chakra+history+pdf+2019PDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02D 11244 bytes
SHA-256: e3493245b01fc810c37350b1a624db8332a3af7001c11aa1cfdfee9752529d89
font_01_sfnt_off00010aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B3 17000 bytes
SHA-256: d6594e81ea3cdde1afda551a16ddfff01b0edd8b389a1c013342dcda8c4d4693

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