Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b7c107e1ba39fa…

MALICIOUS

PDF

83.2 KB Created: 2021-09-01 17:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: de83cf0a000334501152e60402c89c76 SHA-1: c9fb05c3064c9ad64b6767e77574681178b00cc3 SHA-256: 09b7c107e1ba39fab6fb76cedae46c08fc9f94ad44e029d95c8f5e185694d4dd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it is likely a phishing or trojan delivery mechanism. The file contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/60409ce70de16e537e4410d9a5f8c87d/majanatedazofuxitek.pdf In PDF document text
    • http://belean.pl/userfiles/file/60020061034.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609731217bc49---sikutuvebajaresiwitesekoz.pdfIn PDF document text
    • http://minhanh.com/files/fenupegurasepetibexifadit.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd78603c7fe---61750509704.pdfIn PDF document text
    • https://rivieresoceanie.com/userfiles/file/49931328502.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e2db1cb83---3091027769.pdfIn PDF document text
    • https://avvocatoboretti.com/file/92565261855.pdfIn PDF document text
    • https://mygo.com/ckfinder/userfiles/files/pozivivo.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/sksbjrlguivjeht82s4purk1s0/dekitositedataluneke.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a32b2eaf2---sokarubib.pdfIn PDF document text
    • https://lompatjauh.com/contents/files/givuvivaj.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/34569363053.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/70421395347.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/fozowav.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/416092228.pdfIn PDF document text
    • http://anadarkogomezfamily.com/clients/7/76/76920377ef4e0cfe2c6e77079a05cbd4/File/kezadipige.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/20498303398.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f4ef51005---gotuzajamev.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/19494657876eb188cb6222d7a70e57aa/bewelenekatoma.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c80c0afabe---naromupujekonifevi.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/47670255641.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/82720220058.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/f7749cdaaa4da167ce3e83500ed061d7/83725063914.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/6d040d6f171cd5311c513bf76bd15727/bififupixek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=sura+guide+for+11th+physicsPDF 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_off0000d4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC2 11088 bytes
SHA-256: 598e46971de7e0aa62062bbf80132b13496e96afeeafcb816119e12a91ccdcf6
font_02_sfnt_off0001069f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069F 21540 bytes
SHA-256: ca894ab274126525b19b83bac9912dec3b099e139cbbe4f20d53d8ff61d0e6f9