Malicious PDF — malware analysis report

Static analysis result for SHA-256 d750d9df934900ac…

MALICIOUS

PDF

81.7 KB Created: 2021-09-13 15:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e2c0d5175a68780db47395774a998556 SHA-1: 204ae9a32d0bbb6eb3a337a60bff452940f5b370 SHA-256: d750d9df934900ac6e2bc96b1ae8181fc33c9109f85deec78ef70e1272e7eda4
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest the document's purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://catamma.ru/uplcv?utm_term=online+driving+licence+sindh PDF link annotation
    • http://form4concrete.ru/pics/cont/file/nediwigitilibuluketu.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/08ecc7f6bbaf04dcc3206cd3fead701a/pogibi.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/21115023654.pdfIn PDF document text
    • https://resicolor.com/upload/files/lopegujigeluranomakufi.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210906225939.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec38a17ffa---62471266546.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16133ec0cea170---26658180288.pdfIn PDF document text
    • http://reopen911.info/media/file/torizop.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/46668083119.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/64399344308.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/2537747704.pdfIn PDF document text
    • http://poledance-chrudim.cz/files/file/67742162238.pdfIn PDF document text
    • http://gaongonmaiphuong.vn/webroot/img/files/wuzixinujolokajagoxija.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/48644390138.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/gesumipufudema.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/6359664638.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/renasulukifes.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/kovim.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/18145073712.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/14485042776.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16132d09b4445a---vetenosesanenodu.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/sedalitagimenofidopujogi.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/45055378813.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/48890770235.pdfIn PDF document text
    • http://imbirimbir.ru/files/63430765220.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_off0000da07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF219 18100 bytes
SHA-256: cb1d00f32efa5c42e9d2bb13dfbc88fc78e4e9c49b56eb09a6833bc0d906644c
font_02_sfnt_off000121ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FF 10360 bytes
SHA-256: 69fdeb83953dcac34568d783ad3b3329857fb41a7108373fddb81e0c4eae51df

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