Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab44fe7530152e0…

MALICIOUS

PDF

87.8 KB Created: 2021-07-16 11:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f6c11d48656db14d855f8d69cc2a722 SHA-1: 24185ec10ff162c3fa38feb59ad43f00cf901987 SHA-256: bab44fe7530152e0553024657d106759cb30038dd6115cac0047845ed8655ef2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://farmaciafici.com/userfiles/files/mufasakek.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/m0gqo7vu3pgt4jba2bkq7sea13/tisofenowusugato.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/961e42794939295b482677fa0ca5811b/4940918387.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/3pd87q2kpl4ffmu0a7e8piusp1/vapitugizukapu.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/ujqvu8oai40e1p684g6a68tau4/29682803857.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838e71c5e49---roxivebawojilaboseteg.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/16350e5c9c1516f56fbe9e67941213f8/wowobikaboxiguru.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f19ecb10f---79793141096.pdf
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/39760195259.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0ed83f84a---18741612164.pdf
    • http://shipagents.nl/uploadfiles/file/bosedenidalubupobesij.pdf
    • http://amirafouad.com/uploaded_files/file/10697500405.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/qg1g0t8l06486o2c2ulragutb0/50977673887.pdf
    • http://dynamic1984.com/user_file/file/81039233187.pdf
    • http://ondrejkocar.cz/img/file/95677137761.pdf
    • http://cnpair.com/userfiles/file/lulaxofezowix.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/b98bb5dbfebb6e53d70f949c001b8e89/pugigewibuka.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/86f280aa5c3f2a1801809cafc4fc408e/94997223470.pdf
    • https://dreamscapes.ca/dream_scapes/userfiles/files/notekalopurizujul.pdf
    • https://amadesafar.ir/basefile/amadesafarir/files/sotogu.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fb2f9c0c2---niniko.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609f35c673f97---pifovonofanakiguw.pdf
    • https://fokusmedia.com/images/uploads/95298882441.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=ark+commands+to+spawn+dinos
    • 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://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_off0000f57f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF57F 16792 bytes
font_01_sfnt_off00010d91.bin
827b336d5744692971ec8aef5899ac6b80f2bdffb91180b2fa5a9cfcb4ad5a19
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D91 17004 bytes
font_02_sfnt_off000139b9.bin
b0f289b0c823f0e61787c2a2e43cc5b19ab500f55f09d3be93e2d60500d314f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x139B9 10656 bytes