Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe1bc02add2bbce…

MALICIOUS

PDF

83.3 KB Created: 2021-09-17 02:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7651dda583ff1e207e053e0c1fc54e5a SHA-1: 94952af64a40042852fd89fe9165fd62c5e0deac SHA-256: dbe1bc02add2bbce9c0c06e46c8d3e47d102a7f61a4577c5516b256b72e2d298
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=car+x+drift+hack+apk PDF link annotation
    • https://uat-tunisia.com/userfiles/file/mujijupokagapapo.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/fulijolerumafez.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16132ef4f8cee9---48294820571.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/15179698629.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16143c4a377aef---8981189599.pdfIn PDF document text
    • http://irths.com/upload_files/files/kelinijefamasumes.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/24324421439.pdfIn PDF document text
    • http://spartapr.com/images/upload/file/xepodewafatakikedi.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16143093186944---gogatafakivobexojin.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/pixopazekipu.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e72370b39---22419115615.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/7237938794.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/85476284789.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/megifupowewutekazakaf.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202109130829073496.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109041124372096.pdfIn PDF document text
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/witeminamun.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/7883421469.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4c7a9de1d---sixasenas.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/24814594829.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16136bc3789ee8---ketanogomugif.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/96487844080.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/xenokilizixoxolerexisaj.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/79239048288.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE3 10372 bytes
SHA-256: 85f4ad7bf1fd30e6ff65b5fb91c495cc4ab3fae5ce0e81859d24047fc121bef7
font_01_sfnt_off0000f780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF780 18348 bytes
SHA-256: ea2fa37d761c2c4dfe3dd663c89ac3a4f0e12363a59ad60f4d007d6acda3b742
font_02_sfnt_off000127af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1