Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72012d589662cda…

MALICIOUS

PDF

86.8 KB Created: 2021-09-20 08:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8eb0d7d5ba775d26495e1005a32430d8 SHA-1: 98979ccf21bfaf9e3f64a20dbfbd3fde2b97929f SHA-256: d72012d589662cda6b096978777557a4d76470aa9e8087b4c514a6d5d23035f6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains numerous links to external websites, many of which host further PDF files, suggesting a link farm designed to distribute malicious content. The presence of embedded URLs and the overall structure indicate an attempt to lure users into downloading further malicious payloads, likely through social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://archism.ru/uplcv?utm_term=miglior+file+manager+per+android
    • https://rajakeempat.com/contents/files/60803185601.pdf
    • http://osteriailgalloelinnamorata.com/userfiles/files/fobajurijemibeg.pdf
    • https://deepex.hu/hirek/files/93252970153.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16134733298417---bulozikewonetigofevob.pdf
    • http://dailymaydemtien.com/userfiles/files/79949764629.pdf
    • http://www.peritaonline.es/ckfinder/userfiles/files/xowikivuva.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/42kf8o87hvdioii765scq5ss86/nonajedikuguzavetow.pdf
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/31504433906.pdf
    • http://hujiangsy.com/upload/files/zatunepejuganem.pdf
    • https://orderpoet.com/ckfinder/userfiles/files/mametesoxulavimijaki.pdf
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/boratexedanerab.pdf
    • https://www.adom.biz.pl/ckfinder/userfiles/files/sebosamimupexosewuj.pdf
    • http://kamkmori.cz/ckfinder/userfiles/files/13975940639.pdf
    • http://bagumul.com/file_upload/spaw_upload/file/20210917123026.pdf
    • http://simsvizag.com/admin/uploadedfiles/file///69429812386.pdf
    • http://smcertificationservices.com/userfiles/files/tametuvapugukifukibav.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16141ed831720f---20333170906.pdf
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a872929c61---zaxawozegibolesebobono.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132ca410a121---20611012061.pdf
    • http://tetraeng.it/userfiles/files/74940850894.pdf
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dixukukipi.pdf
    • https://aspit.ro/imagini_ws/8391669886.pdf
    • http://vps73.juicy-group.com/editor_upload_image/file/dexemoxulakidusolate.pdf
    • https://408of53crownstreet.com/assets/media/files/wirugojizorilewese.pdf
    • http://tvoirostov.ru/ckfinder/userfiles/files/66747710015.pdf
    • http://abbeloosschinkels.be/userfiles/file/17315229189.pdf
    • http://martom24.pl/martom/userfiles/file/42692187181.pdf
    • 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_off0000ed06.bin
e8bd6b039a3333fea2aeff2eaeedc49a2fcf614cd686190f3c9dd73c82ba0808
pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 10568 bytes
font_01_sfnt_off000104cb.bin
03949bdc6c7bc90391ef8bc0367c283a76630f0586e4bcc1cc046488ce35e279
pdf-font-stream PDF embedded font (sfnt) at offset 0x104CB 18604 bytes
font_02_sfnt_off0001351e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1351E 16792 bytes