Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba896d3464e786a…

MALICIOUS

PDF

82.4 KB Created: 2021-08-06 00:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ba87c3abb043ddad61a2b1ccbf5494e3 SHA-1: cc3de5105c5d87ff51b845a6ae415016dcf545c7 SHA-256: eba896d3464e786afe20b51306d4f0000356d2e5201fea11e6383b3ddbfd81f0
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple compromised WordPress sites, which in turn host other PDFs. This suggests a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external URIs and link farm heuristics confirms the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/r2n0g8m9a8l2t1re2hqj6buim6/33503902392.pdf In PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/gmk8j81v0467d8qmvl7auem13a/sizevozejanef.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/bojilixinamasabakus.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/mogukatiriwifimogitabepe.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160776e13ec8e6---97778122592.pdfIn PDF document text
    • http://www.heksan.com.pl/file/jikebexevujobolup.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/1572c3f6ab9056db1f4ce30d79dd3955/99871381652.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/zalafu.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/279be2ce51aee274145b70c604dcafd4/99872770197.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608fde07483e7---pejapekezudelidugibuxifi.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/86965336329.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210604035003166.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16075b902a56f9---delafisununar.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/13282318382.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/mamusizedewemetewifigiz.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/c0c3f08c57bbe3a4eeb5b461e910ebf4/42858920763.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/68c3e6077990697e6a20e4e2278a13af/4788506518.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/10913605239.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/mofarerud.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/xapujaz.pdfIn PDF document text
    • http://www.uds-myanmar.com/image/upload/File/jerusukubipunuguni.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/butidarok.pdfIn PDF document text
    • https://smaransaving.com.np/ckfinder/userfiles/files/60911277291.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=maldiciones+sin+quebrantar+rebecca+brown+pdf+descargar+gratisPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD931 18968 bytes
SHA-256: e10d01a0e229cbd92b30a49fddde01725937674fe034278e6ff8ae3926529f0b
font_01_sfnt_off000109c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C1 11260 bytes
SHA-256: e0fd43533f14063dc3a0dc4984c2d0ab9406ddef0097c2f61d96e1fc33e1b442
font_02_sfnt_off0001239c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1