Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69387cc5ff7aebd…

MALICIOUS

PDF

96.5 KB Created: 2021-07-06 23:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c471d2fae852dfbeb2f07c30c733a6fe SHA-1: 226903e2f4017db6bcb90170deadcef99cc47f64 SHA-256: a69387cc5ff7aebd48d61465799de4e9c56be9633cb33082a2107648a2a25783
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms or disposable domains. The presence of these links suggests an intent to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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://coretry.ru/uplcv?utm_term=how+to+use+liquid+whipping+cream PDF link annotation
    • http://bfr-bialapodlaska.pl/userfiles/file/pipuxatanapikezokoduwiw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d725e7ebd---36544271224.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/57408974263.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/xunesaregekekinaxizudox.pdfIn PDF document text
    • https://windsbs.biz/files/file/1643982104.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/ccb32d79117de263f7c35e47b7cf43c9/zamepibirigepo.pdfIn PDF document text
    • http://fkhd.cz/data/img/53333802345.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160784955a4365---49249714122.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/nozisuzifozuwuvud.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/89870672367.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/56323462997.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e026fef6c2---vuzikezebuwedo.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9e37da6a2---93741800449.pdfIn PDF document text
    • https://langestrand.se/anvandarbilder/204/files/24115867885.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609485c00ca5c---27802024850.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/mn9qv2ev5bkoptl14bg0bmp4r0/boxunorupu.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606dce2ea1a96---89733855099.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818639aced4---wogebawotojiwazurojesu.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/c154946d7871e96643f1133d2085d626/bagemeri.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/ruxixupifivogafow.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/875700aac40948636ae472df67aeaaaa/34973963404.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073abb7dabc6---mepasiseza.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed2b826e3e---5399973837.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/woremuxezonoxegaturetex.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/30aec32ed1d639f2404de6cc644b1475/kokasefakikolunis.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/10937994172.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF39 17468 bytes
SHA-256: 2737b5ffff05b3422a046e8749ae2a839f6ffc5e2128a1d393653de44b0610b9
font_01_sfnt_off00012d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14512 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_03_sfnt_off00015a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A58 11284 bytes
SHA-256: 2ecbd29e3286a89942daf9ac2474d17496b79a2df89a355b29327a49da649ecf

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