Malicious PDF — malware analysis report

Static analysis result for SHA-256 07567b7ec162afee…

MALICIOUS

PDF

90.8 KB Created: 2021-07-30 23:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 183dad7195045f040d199f745a942b35 SHA-1: 96eb97725e3a0164dc73587422240ee86d77e403 SHA-256: 07567b7ec162afee1cce9c14d91281dbcaa2a3efef22f0e926466402f541927b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, many hosted on compromised WordPress sites. The presence of embedded URLs and the overall structure suggest a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://krisoc.ru/uplcv?utm_term=exercicios+de+termometria+vestibular PDF link annotation
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/6e1c69e09476f43305e98ff47843f975/gubopapezilad.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/tipolezali.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/85637939593.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/8qbdac7214n3cl8vjepsfuae9j/99612949729.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/b50a1e7855139785fadb1e57ee241f40/kuzidezotabiwatudisa.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/407704911.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/naxoxigajeposi.pdfIn PDF document text
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/66553154528.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbae7f33fa---56123516831.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/toroxupetuxofipod.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/pkiuq1l7nl8vg8kei3hji6f3i0/53561204001.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba9c40d219---jewoxazidalusem.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/43bd11e0b0d98243851adfe75269594a/42598841651.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/ivt6jt33h1f08pu0jcmn221hna/38073828636.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/vozeduwulevenevozadonid.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071e9ccd4da6---lugijuronokuvegugugeg.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/korix.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/favibozenefinijowomeli.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/45g8ng0afp5gj8qe26oin4ott3/65222160874.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/44737990326.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/82981171242.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/7pjnlgsacb2kiil3ba2g4sffh5/dunepurowepirolagovamakoz.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/73833857903.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/2260ddbb2667807606142b9bdc350cae/89165679399.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_off0000f971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 19300 bytes
SHA-256: 6c6b51275e0d56b1dbcbffa08847a8e568748102500ade27bd54a674ae9b7bc2
font_01_sfnt_off0001295e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295E 10820 bytes
SHA-256: eed6139f3509b021605c39b9d7f3515a4b589394d62a54cf4da2ff628c4af230
font_02_sfnt_off0001426e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1426E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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