Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc65484bd822100…

MALICIOUS

PDF

92.8 KB Created: 2021-06-28 17:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 59c3a1f8c039d9f4798e5a4bb8ab07b3 SHA-1: b5af23ac4b14ca0c0839e1ebdffa404e649dfdca SHA-256: abc65484bd8221009c5c1294752d5edd924d1758f714b4f0b34621cbc8b7b409
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The primary purpose seems to be redirecting users to potentially malicious content, aligning with phishing or malware distribution tactics. No scripts were extracted, but the structure suggests it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://travelsafeway.com/userfiles/file/23321963130.pdf In PDF document text
    • http://rheinmotel.com/userfiles/file/98512081787.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/zokabasuparemo.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/85984110492.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/b7fadf3889c46e9b82a1aa2bdb41cd9f/nopumokojitexunet.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/af9e01d19a7b704568afe9099e7068fb/bufopivokeziwudaxaxesin.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfa198db84---13013152179.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/88526361882.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/sobiserizebesokudowuvixik.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fn48s6iccmi40aqa4ilaqeil42/rufexolaluzezusetixadoje.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/c790cc8be96ffb4f5029a34420cdab7e/60928540059.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/wakusiz.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/jojurewagivov.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/2acc665d01b890c4ba6c3d7e31f31ef0/52003832025.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a7021b5f3---54122989815.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/30196219531.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/mntgr5p74mi4cmfbgd6uud5h47/vemapinesiloni.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/fadikirogerajuverawo.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160943d011fc24---potixomasokevuliw.pdfIn PDF document text
    • https://mkontakt.pl/dat//file/fixiv.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/d22954429b4db045d437082264c20b84/jubidalilurabirolodipadaf.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e543b58132---80339451922.pdfIn PDF document text
    • http://aplus.to/userfiles/file/diniduralaximari.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce2f484ff3---27976802806.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/b4614b44f729f44263154a4cea43ef56/3716403341.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094e929bad09---2089288304.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3a9373859---rebatijawosolotugo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=do+you+really+wanna+love+me+forever+songPDF 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_off000103dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DD 18172 bytes
SHA-256: 1bebee308923ae7fae20132d96ea84fadf096953b85a79dea1885bd690e3db6e
font_01_sfnt_off00013316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13316 10732 bytes
SHA-256: 2176b6804af26b5f31f17db0af413ab84d968416b54d1d632eac7173472f6efc
font_02_sfnt_off00014bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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