Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a0736d3e574100…

MALICIOUS

PDF

83.0 KB Created: 2021-07-02 21:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a1a75715553e720662b9a4fa8763c50 SHA-1: 44dcca147bfe000ff5c1e66019956ddde594a180 SHA-256: 44a0736d3e574100254114086a7119b4033ea80262b707540e8bf5b620252064
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, so the primary attack vector appears to be the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986b977ee0c---29203388358.pdf
    • http://4seasonstours.in/userfiles/file/9606849773.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/a9568742c27d5617bac985b91540ea06/43986002498.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/00d914313a87c6e88b58f71b216562ac/witeroxa.pdf
    • http://mhinflatable.com/upload/file/vapebo.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/6q0blhn53olosil65j7gqf2vi1/vodumoxevo.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8ef9aff6f---wapefegez.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/ojclroud1refhoe0v53glhu4ms/jupebonapubewebodibat.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-5-25/20210525154814928386.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db0e66b6c9---nodokexapikiluvudesow.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ivi3ps9kh8esbq4uuieoss8pn7/belakifivedunev.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08bc9eef62---rizunitimosakujiw.pdf
    • http://viviapalermo.com/userfiles/files/jowukisidufodipaz.pdf
    • http://aarogyamedico.com/userfiles/file/lidaxejiziminevabu.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/22a954d4ffed66866d7b3f23b8fcf42e/11049251248.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c62327e76f4---rexaruredanugobijizan.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/it9m91ebej7tuapvu3fv7ia8e7/33739170388.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b025bef9d---50431865599.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/c6579a97b016f192f4c2964748482995/70043792849.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/0208cd2ffd771ee7131e46490b3bc59b/xubesuwinumotebixaradir.pdf
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766828ce823---66571992832.pdf
    • https://ratsimae.eemedia/contents/file/80913288559.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073c1c751781---99846647302.pdf
    • http://kamkmori.cz/ckfinder/userfiles/files/tewopukepur.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a226d85012b---gogexitagopakubipemaz.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=that%27s+odd+meaning
    • 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_off0000e479.bin
ca1de45ce90a85625a1902ec70bebc9c0d406c890151227ab347e4a410e3c798		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE479 10544 bytes
font_01_sfnt_off0000fc30.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC30 16792 bytes
font_02_sfnt_off00011442.bin
a092971aa9fc4af10cbf8ce4af776cf22368ab61805496fc8a3dd6b40c545b7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11442 16456 bytes

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