Malicious PDF — malware analysis report

Static analysis result for SHA-256 65bdbbf51194b7ec…

MALICIOUS

PDF

83.6 KB Created: 2021-07-04 00:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d5c805f2a6d3780aedf97a28396fea5f SHA-1: 85bf5744a44b927fa3aa789807e5402bfe405b07 SHA-256: 65bdbbf51194b7ecbdd5502c7da2d3c90cf7b915939576daaffd0ebce3baa660
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. These links are designed to redirect users to potentially malicious destinations, as indicated by the ClamAV detection and ML classifier flagging this file as a phishing trojan. The presence of multiple compromised CMS upload links suggests a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://catamma.ru/uplcv?utm_term=example+of+termination+letter+to+employee PDF link annotation
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080105f7552c---85817304220.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/136ffe3268569af409f043986c192163/8218757856.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a3ba8b675---jukasowiniruve.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/sidapimu.pdfIn PDF document text
    • http://kaies.cn/upfiles/210629112038395144ah4m6g.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/bebavopofazimituxu.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5cf22564f---dififaxitaxidesedepunab.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/kiwupekufaw.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/a81e54226e6d8d0db6749883bc857c71/65059043441.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/58527560853.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/50896915149.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021061516505150.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/05376c3eb0efc5b309e97dd0b80f2260/32784369371.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/maferej.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160745621ca9e1---kuwudowulutijabepadiwub.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607080dac2b64---jatosimebagusawisaxop.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16083540f76a1b---dumufobidetitepe.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/wibevefogitepevipevavax.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/78962534235.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080b3a1570f7---lutizazosup.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/915ce58c917180f4f9aa081d456dda2d/beputemob.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/ep15pa05bs8p2d8m9fakooreom/8755879529.pdfIn 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://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_off0000e6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A2 16384 bytes
SHA-256: e3734dfa0d375e7daec1707e75181203585e6b1720469220046ea9da12286b23
font_01_sfnt_off00011124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11124 10552 bytes
SHA-256: 64c8e1dc1354b444e5028402ac1970a409accda0b4ecd92f9e24e7fe77654267
font_02_sfnt_off0001292b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.