Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62c022746661266…

MALICIOUS

PDF

88.5 KB Created: 2021-09-02 22:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1cefe57150d4d738bfc9362a5f68c8aa SHA-1: 4cfeefbc63d19bdcb30a5598343c18c1c76022d9 SHA-256: f62c0227466612661e2208d06fbfb000727ff29b410a397807e0b681f91c1149
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised websites 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. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://feriaalainversa.com/uploaded/files/27829374307.pdf In PDF document text
    • http://valeneighbors.com/userimages/94331812770.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076578d86252---75363974432.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/bedc39af925630b38329ee33baa3be75/fewukepob.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd2f0afa73---renerun.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7a3b80de9a---lapipezita.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/00279e806ae09b913e7679ae2bddfd61/75038627137.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/5e32tt61ok1bgvk2aib4lanckp/ferugiko.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/detenaliri.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210817155652_422239567.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/b4f7c1ecd9caf03606decbafe8def1a5/jitalazajodelomusigifarin.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/5226ea803e61061776dc75d1c0bb6679/lulopovoj.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/zikem.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/70efe2481ae911ca487d92d1660b518f/39798284673.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/80830419507.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b36baad26d---bukumukewibofapukarisog.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/161066285b1222---68299261082.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/sajug.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/97087633150.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9011ca3af3---jipagipesimezasokelew.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/sutemawamomijupe.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57484c0f06---veluxexulisavagupiwojor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=certificate+physical+and+human+geography+book+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF415 17200 bytes
SHA-256: 1152bc5c5fc213089d90c23c74a1189a72f97d791e65de764a1aa8b137614a72
font_01_sfnt_off000120f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F0 11544 bytes
SHA-256: bad611e7866ee0b6fc442cc70fa9f255ba0e7b9a5844500caf05208906d7091a
font_02_sfnt_off00013bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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