Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da18ed9a7a0c8b1…

MALICIOUS

PDF

90.7 KB Created: 2021-06-26 14:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 943c5da3f39d3029c9d708dac59b2be7 SHA-1: 050786619bd0a572d69dbad7abc40cdf2aeaafd4 SHA-256: 0da18ed9a7a0c8b1df6a1faacf12669648b220af99e7e372ae05996a469842d4
196 Risk Score

Malware Insights

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

The sample was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing software. Multiple URLs point to compromised WordPress sites, suggesting a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/8bdf3cb042d05ecf4f2a54710010431d/65742428622.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb2389c600---lavejop.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/81f16eb9ac41059632a64c4b7ef87886/ropavapenuzer.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a764d332e44---voxirazeji.pdf
    • http://ankaser.com/userfiles/file/zarajajulafe.pdf
    • https://dubaimotorcycletours.com/uploaded_images/files/85727263866.pdf
    • https://cleaner.pl/userfiles/file/27512453251.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094203bba7b8---lofiwip.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/qsuaa8vh5bebbpojst75rnkpfb/47566031343.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/eb81ef9fd6cf1162abf61c2e47c544c6/gajokon.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/5qnle4mcc0af9f6toie8ji1nno/fijibewosisibogitanak.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b0940d98a42---xorukudaxepepalasunidi.pdf
    • http://steakclubhn.com/campannas/file/75487153438.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/8lsl9fost7h05qeeqcalp0t012/vobirikone.pdf
    • http://aire-limpio.com/img/editor/file/75854965258.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b23d23c495c---xotuderusuvarujama.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea0235b5c7---melukuri.pdf
    • http://barnesfamilyre-union.com/clients/52050/File/nuwupofazajaxozanufiwo.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-5-12/20210512080851377420.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160721201c12a6---fununav.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/q478nfjg2fq9ckibtvt3gej0b2/12081997349.pdf
    • http://citra.cl/userfiles/file/roxovunixopowidedidumujod.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=uninstall+chrome+extensions+manually
    • 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_off0000ff78.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF78 16792 bytes
font_01_sfnt_off0001178a.bin
900b3ee8fa6685a52500bdb7b9c43ec0153a6b6bcbbd25161a35d2852a54e174
pdf-font-stream PDF embedded font (sfnt) at offset 0x1178A 16816 bytes
font_02_sfnt_off0001435b.bin
bfe43830b71bfc593b1d8beee6eb9107084079d2fc30cc953dc856b4cff723c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1435B 10820 bytes