Malicious PDF — malware analysis report

Static analysis result for SHA-256 1addf0f463397e6e…

MALICIOUS

PDF

93.4 KB Created: 2021-07-03 03:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 56e03ee26b3dc483d79e8b2d8389eab4 SHA-1: 44566e5a6da306aaa133f4b15bde2ec061e419e8 SHA-256: 1addf0f463397e6e5dd117c4c0c329dc769971fdbee216cb1429f791802c2b4b
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/677ee01f7f11989e04ca7fec029f5d12/vumepaserekaduma.pdf In PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d7964b95174---norizulezufikalu.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/7931611699.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210523191854.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/5e100b975e7971bf1a22758cc8a7f903/vabusowigubonananos.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69fa1e289f---sexaganidumunebir.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfda8bdd558---zikugitedapagoxupetu.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/1nlah22k7oidijnch7jgaso032/loxuforifoluwijederilog.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/b87a6484d7e871cf150209d7523dc53d/kozujuvekolebewutivogezi.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/7bbb0bf27da88bc8bd6eeff3a81ff384/51417510755.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/poxawumedoniwikan.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea97394690---40124503204.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800449782ab---21451925133.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/66716692863.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e59b63b23f---69439739542.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/gevosakupofosuraf.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/30832180585.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074089b75119---xagarusomut.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/39446924444.pdfIn PDF document text
    • http://waelfawzy.com/userfiles/file/10904443540.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09b82dbb64---kozologalesuf.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/lroks1l0hmabarhfim32q7vv71/fozoriwoxasoxuvapemozifu.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/89009111240.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/628g4gm9oj926nk3f3ughbtrg2/71954525366.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=beer+and+ginger+beerPDF 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_off00010797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10797 19192 bytes
SHA-256: e706df4577d8444604f821ecf12dcf1fb1c4db7938a69e0fadfa9cfda695bd6d
font_01_sfnt_off00013a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A16 10184 bytes
SHA-256: 9285471d3b8c88685b8b1d5e538d2762e428e6e804eb09e0b62d6fb2c9d738b9
font_02_sfnt_off000150b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1