Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba91d0ee0ee114f…

MALICIOUS

PDF

73.3 KB Created: 2021-10-10 20:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d19efcf8dcb481b84eee5cb3f9985d0e SHA-1: 8e9e775ad42a3f14dfedefe7765a205a5676a6fd SHA-256: 8ba91d0ee0ee114f92801481c31ee142efa7751157f09fb939a7de8531f46655
176 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. The heuristics indicate it functions as a link farm and a callback lure, suggesting it's designed to trick users into contacting a fraudulent entity, likely for financial scams or credential harvesting. While no scripts were extracted, the presence of numerous embedded URLs pointing to potentially compromised sites supports the phishing and exploitation intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1615d88eb1670b---7808837260.pdf In PDF document text
    • http://pbhdom.eu/userfiles/file/93918067581.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/ramerikoketok.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/lamadotewusadijozo.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/82112491398.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/63587437400.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/940c4eba0e767869c652af7f6a2cd8d0/bawizekimitezoniwopo.pdfIn PDF document text
    • http://flathead.herosuite.com/userfiles/file/miferunopodaluwub.pdfIn PDF document text
    • http://santinitravel.co/files/others/30090174197.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///zaguxejikuxu.pdfIn PDF document text
    • https://war-old.its.vn/new/userfiles/file/neramotogaz.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/debokizaripesidumobex.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/55681313098.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/ma4isja6hp4gttbv1e45jf6jl6/zaxodibo.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/nimovojirakema.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/buzozupep.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/51823488476.pdfIn PDF document text
    • https://ruxthai-guesthouse-chiangmai.com/ckfinder/userfiles/files/jefagubafatekugujidoz.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/navefolagatu.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/kafejiweturukurosuxejag.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/mokifaloganugisilofizox.pdfIn PDF document text
    • http://firegallery.ru/img/upload/85820669867.pdfIn PDF document text
    • http://baocaosuhoatoc.com/luutru/files/23740300460.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/13253890328.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/muliniwujekax.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/18548830731.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=find+roots+of+polynomialPDF 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_off0000ba4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD262 10620 bytes
SHA-256: e4ba90a1504f65aa3080916c56e5a3647ed8ce53f5babf9dc503ab9c8576feb2
font_02_sfnt_off0000ea98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 17320 bytes
SHA-256: 67b15f32c8e06a51834736d067f9f49d76167d6804acfb807cbab26aa39bfa3a

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