Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec58b5b7900b786…

MALICIOUS

PDF

97.1 KB Created: 2021-07-15 15:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4f4db93ad76e203545501b04044a76ff SHA-1: 9956632050dae72b6900c5da24914040c1f00d26 SHA-256: 8ec58b5b7900b786d0641c35e8e2447647fb8dd876259e41932042d1bd561f24
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs and exhibits characteristics of an advance-fee scam, specifically mentioning lottery winnings and parcel delivery requirements. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://irlanc.ru/uplcv?utm_term=bobby+flay%27s+bold+american+food
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/m8cgf3uqgpgkanrcp0qg04dh9c/99921601124.pdf
    • http://xinyuemu.net/assets/202106/files/20210617210119979390.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85f936d9a6---63795419638.pdf
    • http://zabradli-znerezu.cz/userfiles/file/72143762115.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e79d9971f---perosusobesav.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160853edfeeb17---35825469032.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a5aa2d443---zipikeberivifolo.pdf
    • https://dodatnagarancija.com/userfiles/file/narawozufonadaros.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078aee7f1803---31273556011.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8ff95a671---41934096715.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/0603ca5538b43db461ad0ccc606aaec1/tilewomoson.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609769bc68d10---nuvopefaliremug.pdf
    • http://partnerplus30.ru/images/fornews/files/75283868461.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/59cfed35b9469c6c9441935495dde42e/tirexunovupato.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/1624215f4a0d5aedfb1c9fa68479a6fa/89272575979.pdf
    • http://cdmatik.com/uploads/file/jobinijelajepul.pdf
    • http://shannonlakeestates.org/fck_images/file/542758729.pdf
    • http://alphaconsultinggroup.us/vpw/images/file/44015394370.pdf
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/nubowemupikamikawozabok.pdf
    • http://learnazia.com/fck/imagesfile/galitaxegowekodegunajazu.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_off0001162d.bin
f55ccc52db49928a714bd45ca65a108683974d029edb602e7ce4fe66b87cfd18
pdf-font-stream PDF embedded font (sfnt) at offset 0x1162D 10880 bytes
font_01_sfnt_off00012f62.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F62 16792 bytes
font_02_sfnt_off00014774.bin
a61bfe7a08760a3478acc037f527ed2745a8cffa951caa50eda8449d6bc68385
pdf-font-stream PDF embedded font (sfnt) at offset 0x14774 18328 bytes