Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae66212e10af5f7c…

MALICIOUS

PDF

86.7 KB Created: 2021-06-28 14:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2999b893e3142bf65a456d409768f41b SHA-1: f1c1b4523fad9cefc2c6f6b369d69a9d577da544 SHA-256: ae66212e10af5f7c19aea87775b83a17be4ba5503f70a4309b022da4df17e67b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or IP addresses, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/0eb2e42ecd5c31ffba59f0d35b189e45/juvabepuxaxap.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160912942628f1---62031507849.pdf
    • http://ahsaipu.com/v15/Upload/file/2021551845304198.pdf
    • http://chono.mn/uploads/userfiles/files/17145546921.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/0e67303dd1643a211529907de519530b/sibodaxawokofalagipesugok.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/8c94112c4242e7177f4f0ba1398cb234/tabugaxuwemudizimik.pdf
    • http://iphysiology.ru/upload/1076131839.pdf
    • https://virtualpulse.eu/UserFiles/file/fokanitel.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/36bec79695499ca2639735801bc18b19/ferinamitigavusivulanus.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a7e3dd388---81651257749.pdf
    • http://espacioschillout.es/images/admin/file/10983278636.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/3932b6b206ec88b10151ad2eb4d76641/80446578754.pdf
    • http://abpaluso.com/upload/file/zadezileke.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/5c3e901u0grn7e8d7q93kfqeuh/jijepujawexujukuvurogu.pdf
    • http://akkoryazilim.com/userfiles/file/63994173273.pdf
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/28cb8c8caff71880c25c1ba4bc7327e0/gakezuserupobudabubir.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/6fc46682e20a757a6ef9c8eec7f93a55/38779293670.pdf
    • http://richmore.kr/uploadfile/fckeditor/file/14595467756.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a972df39e---52799366169.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/8c279c46bb77c9e9bb4866f5e0c9ad26/ruvesatenuniwadafuvevi.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/r4k54cc3p1m1vn7mtroe81gq10/zuvutitem.pdf
    • http://csc-021.com/userfiles/file/20210627103004_66vzu1.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767eb862890---50004315680.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbeede61b0---depapur.pdf
    • https://dynasty888.com/image/files/20210604_145300.pdf
    • http://plkorea77.com/ckupload/files/tinuzituzozidazaborupitex.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+remove+line+in+ms+word
    • 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_off0000ee57.bin
fc6acbe3b41072ced5d856e309fe688a7113cd16c229a4d9b7d4342740d5b0c8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE57 18160 bytes
font_01_sfnt_off00011e21.bin
cca5fda858edea2bebb3e0b77ac90704e3fcd9692badbf9bbacfa5dca8d6963d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E21 10388 bytes
font_02_sfnt_off0001359b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1359B 16792 bytes