Malicious PDF — malware analysis report

Static analysis result for SHA-256 59359c3e4e5eefda…

MALICIOUS

PDF

212.7 KB Created: 2021-07-24 19:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c61aaa5bfbdce9533bd9417980c538cd SHA-1: 48944ff011bffad772d37996306eddb29c0b6180 SHA-256: 59359c3e4e5eefdaa9e888328c7933c4320111016c777dc3918a4b0fe3d44cd3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of external links and the 'Pdf.Phishing.Trojan' detection point to a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

Heuristics 5

  • 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.
  • 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://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c379220eb---panogovetaxezusezone.pdf In PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/tufudaputoti.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/tenamilededuva.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/6cc630ca70ebb6ea5c43d5fedc94c931/8011056290.pdfIn PDF document text
    • http://lakes77.com/clients/47041/File/jarokulof.pdfIn PDF document text
    • http://juhaszautovill.hu/userfiles/file/59755459423.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/dodogexebofosamirowudeme.pdfIn PDF document text
    • http://evola.it/userfiles/files/12167976897.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/i6t98t9r63j22nlq3s0pu7g1c3/siposuwanugudemuduf.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/gisudo.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/1212be292de7096f75c9feabb1fa464c/xujatizegagajozet.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/23cfk3p9ijfnrfcrfpvrlp40h5/xixuvoluja.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/ropovav.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/16224524301.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/72611917316.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/9tkoellrhaegkr3shu81sb4b21/tijolukofekina.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/0un2cpsgt784hji072hlmnktd1/63458025386.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/92523585689.pdfIn PDF document text
    • https://lepjunk12.hu/uploads/files/daxikefamugobigaw.pdfIn PDF document text
    • https://retta-bg.com/userfiles/tokosuz.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/d7uv52as5ov2ov130t43ad90q2/tivil.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b206f096147---jafuvuwejog.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/qvct6h2f2dv8ck9uk84ve408ga/68584636635.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088f89041af2---nisatupuxudezosuvomukemi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=what+can+i+do+if+my+employer+doesn%27t+send+me+my+w2PDF 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_off0002e34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E34E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002fb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB65 11232 bytes
SHA-256: de609e13436c39e49c59b574f8f9cec354a8291c1518b560e84ddac1af952ab9
font_02_sfnt_off000315b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315B1 17448 bytes
SHA-256: 9664d97e4066d0c847151a4be27ccf4d789df4cc80893d3ffa92de9b2e6410e6