Malicious PDF — malware analysis report

Static analysis result for SHA-256 596081d9179fee6c…

MALICIOUS

PDF

83.0 KB Created: 2021-09-04 16:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 4af6f96c55eaae4bdd795a5f95a8446f SHA-1: b5c8e41d042a7491f7d32e32d99cd7df8703d349 SHA-256: 596081d9179fee6cfa8e0ed00b03702ca027d10441055e349083dac48658e1ae
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript, suggesting it may be used to redirect users to malicious sites or download further payloads. The numerous external URIs, many hosted on compromised WordPress sites, further support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • 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.
  • 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://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/05c3802b6081a9759a48e171c8458850/78928406614.pdf In PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084c0c2d8a81---dajiwovojubifivow.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16089f7fbc4cd4---kekabalelodo.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/33274146222.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/41770212259.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/roraxebugam.pdfIn PDF document text
    • https://verner.lt/images/files/7278827957.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/8ca67b1f343914c4fdd2e12ea5797efc/62026617980.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/9t9ik5jm2rib2ph3b7lsgs8q0c/4248230214.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/gurilevexoriweboxi.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/97162485911.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f45d88e07---96084694734.pdfIn PDF document text
    • http://debeight.net/UserFiles/File/zovizozul.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/64268625890.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/58757468881.pdfIn PDF document text
    • http://hncastlecable.com/d/files/70599359317.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161248af350156---tivifatiparutivutiji.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/kubodavonudavevafevuviz.pdfIn PDF document text
    • https://signika.pl/Upload/file/nolonumupividepowej.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/suvobewelememugakomali.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/kavitoposisosate.pdfIn PDF document text
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/50219102771.pdfIn PDF document text
    • http://w3-japan.com/js/upload/files/33428089795.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=relationship+between+poverty+and+social+exclusion+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEA 20536 bytes
SHA-256: 0aff1b8abbbad1dea09a869ad1aeae83b9ee9ab7bb8d6ef4623188f50b17ef68
font_02_sfnt_off000122f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F1 11368 bytes
SHA-256: 5170ff67fb9dcc4595975416ee7ae19f5eb972f9a87f9f29377cded7ab847331

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