Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb35767e577eac9…

MALICIOUS

PDF

95.3 KB Created: 2021-07-02 20:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70b680fe816dba156e1d4bb5497de326 SHA-1: 054ade79deabf3f4f1cd08e79c28c5a6c89f52d9 SHA-256: 1bb35767e577eac9f3e7fe2d7bdad60c857974ead33a69e6b45d94b77ea2e767
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to various domains, many of which appear to be hosted on compromised WordPress installations or disposable hosting. This suggests the document is designed to lure users to external sites, potentially for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://dcoderesearch.com/uploads/94536250744.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160849c703a450---mumojes.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/5q07dcca4net7hk2354fesu3gb/tuduritoropanamuta.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb0305b891---pimokebijogef.pdf
    • http://paroissedementon.fr/upload/files/52314185599.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/24a152a1c28c4a02936c88eaa2618e60/ruxoguxamukebiwelapetas.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/d90p3f62ehvegcv94e1r77lte0/woraledemizuxodukoze.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/7159c8dc012333016da649bde7e5704e/womotomiwo.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c109e678b47---56361620273.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/48o9n8le7cu2r9reiip9o3oi54/ruxuxipudegimibub.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a97a3cdf3---58479975990.pdf
    • https://aradmissions.com/ci/userfiles/files/pureniv.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/fbffd8c631aa9c394aa34f4528dd64ea/40056526981.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074d8ba855b0---dalebibexajamiv.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b56095e1b48---xegapofu.pdf
    • https://urbanlivin.lu/userfiles/files/sawuku.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93d1aa099---kevetuwetexazive.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089363e45439---8063020731.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/d78be3a45561e63f9c16e648613d3d3c/79593139301.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859e0b6c8b3---zekupewixudizapoz.pdf
    • http://nuraski.pl/wsg/userfiles/89765083943.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/13832341154d84ff1b7f1f56ac19b0a7/sufibejuvamojawow.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bba9f3b3ff8---jifekim.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=delta+green+form+fillable+character+sheet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc08.bin
d691efcb618a5f3f1c07dffc1f638308047d118adace04a6f117cea96fd4c7bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC08 22080 bytes
font_01_sfnt_off00013374.bin
6ee1786c7a0e915964aaafbbbc77496d1e14688d11736e9a5b237ac69efc8397		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13374 10924 bytes
font_02_sfnt_off00014c95.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C95 16792 bytes
font_03_sfnt_off000164a2.bin
2e9f6bd2dee920121524b6dcde0b4ab2b2fc20757835f3d0b7fddb14c0d0092f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x164A2 2476 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.