Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e9ab03a3e3bb24…

MALICIOUS

PDF

96.7 KB Created: 2021-06-27 04:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c034e5bf75ce23176e631c6522085524 SHA-1: 5b396ef1ceb23598bf781f8d29cee20e2d311260 SHA-256: 96e9ab03a3e3bb2457a433e490a3e1109b488b586ba725b73506f58751b63aaf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely to host or redirect to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/fbc41f3c664de646a0d79050979ba554/93352796070.pdf In PDF document text
    • https://damsindia.org/admin/uploads/file/mibidoda.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a96c9bf49---82037560111.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/fcedaf20bdde1fe7ecbf8ddb09a0ef24/wamawafozixifalevoneloja.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/5cc624dtef3gq2m6ljaoib01a5/ravulad.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ag7f7sig1n3ad3bm9omla2pae2/39574828299.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d18cc49285---miromugexu.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075453c5a439---16915333037.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/0phkfut19kqbtiqakli5dp1805/35584627617.pdfIn PDF document text
    • https://kuepancong.com/contents//files/zununijozu.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/13368624238.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/fowepekanonosel.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/87ef716e927019b455c14d0e8095aeef/9694387700.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/10c338d925eda9b0c0c1cdbc48a64707/52024712672.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/9617e8d38a3b2c5dbd029a1c44731113/38979037478.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a6836314d5a---sadupedaxapobonugitavajo.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160909da5c1ebb---96087482394.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cabb4981156---dekojeparuderarevesi.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/2b18eb535c23f08cd96dc8b6c51ec7dd/9129207559.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cffc34660---wemonesebatodajabut.pdfIn PDF document text
    • https://educhina.mn/editor/files/suzexokig.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/d09n6ltpamuvesslth8ou3gu34/50140823257.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/43010931472.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=pleasantly+meaning+in+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000104b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x104B1 17920 bytes
SHA-256: f6a5fa2b94d36ee7a73f55b0746c331d0c886e1e531a6576d8568b1482890098
font_00_sfnt_off0000dfb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB8 10452 bytes
SHA-256: 62b0ebb9c419048334fed55f5e6973f7a40568d16b551010ee54ea8861623ee9
font_01_sfnt_off0000f737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF737 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_03_sfnt_off000120e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000138f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F9 23884 bytes
SHA-256: 3d0a5fe6f84db4eebb1e2b83c86f693dd60f67ae91fe25aba18855c04469aa92

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