Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de07849b6f019ea…

MALICIOUS

PDF

89.4 KB Created: 2021-06-27 03:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b3959e399722b1603fbd188550737b50 SHA-1: 8adfc265afa75531bce0d72ba5c30b1d21ed3d01 SHA-256: 3de07849b6f019ea4a3d8e36e25177a24e0f2496006e9f4a780d6b3849d214ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a ML classifier and ClamAV, flagging it as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple compromised WordPress upload directories. These links likely serve as a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16084774330f5b---41454575657.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608326a7c60c5---bawomomi.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/b0793f6d4fdbbf540585c8067fcfe157/bewofuvo.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/cb4ff4079c635741b884aa6f5627904d/51070845387.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/0e4b66cac6acd61392f5ea2f35d79f8c/151521816.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5e6480b9d---68910032988.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ec84d8696---sufidawibunafuzatorajo.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4c26cd222---ruwajomim.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16094178192989---xisarikotelejedi.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/c5b59409f635484801afcf39d6e88908/35244233080.pdf
    • http://firanywiktoria.pl/uploads/editor/file/rolenuzazavenatuvobofa.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/7tog53hvfbv7csa6khof52uah2/wibuzawejakuxivemetemuzu.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/363e892d56e40e8214d8c5bb6bd9ff6c/54319931842.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769ab1f2055---14538403472.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/4087c90828fee3ff282c784d4adb6975/940753733.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975c7338988---xomesuvirudanoxugej.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b03189e654---84191763206.pdf
    • http://shop-cartuning.pl/userfiles/file/zafigagagisekuvupob.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/cc039ce4bafb08a8045eec78ee9c4e0f/84607078686.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/v0jrmjchs6v713hh5ocobhnc10/76803693904.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/1b1593692077be16c83131d97ae89f0b/23598803072.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a928f5dba98---woxitatugis.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=a+monster+calls+by+patrick+ness+pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6af.bin
bca7afdfa1525e3d6aa237702ba766c7ccc395c076bf6f034ddda6609ee60111
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 18092 bytes
font_01_sfnt_off00012523.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12523 16792 bytes
font_02_sfnt_off00013d3a.bin
8b8f373940ce24a14d45cb8e8a362a0f882869a5008b3d3136177819227af88d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3A 11108 bytes