Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df1e49489b8e4d5…

MALICIOUS

PDF

86.8 KB Created: 2021-06-30 06:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49462f476c799c22c79b91a6f523ba1d SHA-1: 52293bb82ad0071d6b0f39c7fb08d7b1c422a3a8 SHA-256: 9df1e49489b8e4d579f5f74aa912110ecdbeef4c83a429932760180f73c493e9
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. It also contains numerous links to compromised websites, indicating a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/c5cc976b8ce443907564a7e9bedbe7ae/1298236968.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d37bebdec61---gogozodoraboxexadipawugo.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2497d06cd8---foloxuzixopu.pdf
    • http://amuseonline.com/absite/userfiles/file/65120129293.pdf
    • http://volvo-cars.jp/js/upload/files/22495644256.pdf
    • http://havefuntogether.com/image/upload/File/soximovamukidinuremes.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/83bbc527345ee333d174297b0a761766/63868214175.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac532b37354---loduvi.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160772d2fc0554---21409541776.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081ec5235308---guvudabijapazemaxiwapeva.pdf
    • https://codecs.roimages/file/kewafobinabokovopabinov.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/978fbb58b27eab6070faa1ce92eb4dc4/36749891901.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075d568cf803---mikovebusepivopiw.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/66d68c7aaaa424f1d68d1ad668187817/63972733957.pdf
    • http://eltonltd.ru/sites/default/files/uploads/senasobitowutujupaw.pdf
    • https://tenfci.org/userfiles/file/derewiguxizuxukavidovaf.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/39d09298799ec4576e69e4deef697b57/papukokekeke.pdf
    • http://ifaistos.reality.gr/~triantaf/images/file/mitifojedafanolu.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/a21fe92c313a5479cf42727f7a4f1111/29687793456.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/42emaqlonvhcoq0ca2tr35qh30/lobinosunolafog.pdf
    • http://banghetretruc.com/media/ftp/file/wunazukodeverusaketikut.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/bb454632b949b5da24f323f9d744820e/14992292960.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb26bae934---dagefalexedijoz.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/2vhjk8c4pcssj4knqi4r9o1eq3/sagefigukale.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=brain+aneurysm+in+young+adults
    • 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_off0000efdf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDF 16792 bytes
font_01_sfnt_off000107f1.bin
6ef82fdc52d00f133eb190ae77424057b1c905cc97d5e1e415d8328eb669d7ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x107F1 17180 bytes
font_02_sfnt_off00013518.bin
de983e4c4fb1ec4710d1d17b9b63f1f5be0a933755254a9c2aa4797dd6c76357
pdf-font-stream PDF embedded font (sfnt) at offset 0x13518 10856 bytes