Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a47fe793d020a9…

MALICIOUS

PDF

83.8 KB Created: 2021-09-19 15:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4ffe6a81f78693a17b9b2ef37a7ff12d SHA-1: 29e08485e6fdc766d012c795d0bba8f375355753 SHA-256: 64a47fe793d020a9a63cc446fd11f3c7e6822bee505dd48a580b547ccf3a34dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs and link farm structures suggest an attempt to direct users to compromised websites for phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://smidgel.ru/uplcv?utm_term=my+hero+academia+ways+to+watch PDF link annotation
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161400723d4d1c---vadojudonuwobiguse.pdfIn PDF document text
    • https://sausalito.com/wysiwygfiles/file/loguwimobotebosine.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/wukavuvulipiwutalun.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/82411259924.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/741bc32a6c712adcb7ad967b471db245/93018583996.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/50aef777e921cde01ce2516e3fd85997/jebimuvizopirubafide.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/ritepomeferugiguvew.pdfIn PDF document text
    • http://gradn.ru/uploades/fckeditorfile/namadedabeguk.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357efac2c5f---46801193821.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/94627080656.pdfIn PDF document text
    • https://rajnnuhiddje.se/userfiles/file/gotifesok.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/44874557869.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/fea7b842a53199134fd3dbec1ac860cf/wevuwese.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/folozipewizegib.pdfIn PDF document text
    • http://househouse.it/userfiles/files/68909504420.pdfIn PDF document text
    • http://web5gstore.com/Files/files/segisikogodukevebiru.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/74397725358.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-12-03-34-25-79.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/a2e98feb7da2f92a98885dcd150b43d0/nazojolo.pdfIn PDF document text
    • https://sambelteri.com/contents/files/58716167605.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/foxabugit.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/lumulobegixonajodekijijat.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6ba35745b---75487425608.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161400334eb0b0---falipuwimadirez.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/towutozefewaw.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/fojawoxajibumirugufefagu.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/98811364957.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_off0000e2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 17896 bytes
SHA-256: c27d28800641e7d14de01a7caf6c1b01685069abadb961ac3dc3acf29dd191b7
font_02_sfnt_off000128dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DC 10680 bytes
SHA-256: eea02b59346a933388f2a97547a2a8ae3babb50fe9cbc6dc3d4c5b85fa64d10e

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