Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c01ee2287785dec…

MALICIOUS

PDF

87.7 KB Created: 2021-09-06 11:34:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9e8a5419de9eba9f4fbefd0b583b6958 SHA-1: 7f7cc4719b357b38f253a48497be132bc6fbc571 SHA-256: 3c01ee2287785dec10575653ec75888a24c3da0267ad92a396fd637e1f9917af
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains embedded JavaScript and a link farm pointing to multiple external URLs, many of which are hosted on potentially compromised or disposable domains. The primary function appears to be redirecting users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://kancelaria-perfect.pl/app/webroot/media/files/32967482506.pdf In PDF document text
    • https://unaizahic.com/Files/files/70624192614.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/xorisufudewo.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/63289510837.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/9d81c8c5e4a056f3fc35985799bce27a/19015769924.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e212e11b8---15702495679.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/84311609250.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/47009377056.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/eeb602b9e01a4a061d6d1cb49bddff84/fetipaxezuputolasure.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b04cbb03460---93488932689.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/5gqjajsa6l88vkdc3v5k625vl1/89150097577.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/6503147246096a76d68fcf.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cddd50c8943---misipirolikisosal.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/8fa7cb9b731362eed9a625e7b2e0265e/44554390827.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/vmkdcqmk7mesqf2eqp2clh84g0/vawezanowalesamanovor.pdfIn PDF document text
    • https://italvaping.com/file/zasewakugu.pdfIn PDF document text
    • https://dm288.rs/slicice/file/76890043769.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/mareketijanonakexa.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2ca35846---rigegedamepirekuton.pdfIn PDF document text
    • http://strandedtattoo.net/file/valututaluxopaxojaraz.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/xejolebazolisa.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/98212379993.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=embraced+by+the+light+betty+eadie+pdfPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/15a60aff27b17e1b92bd722732f51fb3/gopafudabikemajajonor.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_off0000f480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF480 16944 bytes
SHA-256: 94a55384b5704860dc4eb881edbc7182251af3da06e082097e7f6e6362d6713e
font_01_sfnt_off00011ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13812 10912 bytes
SHA-256: 443d062b3060ed2b0dbebf5a46f7047ab1bb674cb1c61f04a6a5c0fdd9b348e3

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