Malicious PDF — malware analysis report

Static analysis result for SHA-256 118944f17be14f81…

MALICIOUS

PDF

110.0 KB Created: 2021-08-21 09:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e7199cc1963f9b762c7821990b96fc63 SHA-1: 5a61acfac2ee73f36b0296e1070bc8260849275f SHA-256: 118944f17be14f814ac6e56b72542577c4f9f01db2cbc6190529a30a289ce880
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous external URLs, with several hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://cutskytools.com/d/files/rojafagotewojexepuri.pdf In PDF document text
    • http://ibtaker.ps/userfiles/file/filuzovuduposudu.pdfIn PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/56434455411.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///lefulipogiripuze.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abf9b0f11da---89852693445.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/safefilisowutuvesokagofe.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc99d70f3b---zunatogawinegarija.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/0fb08c3150173063c422c50e4fb9d053/85572017470.pdfIn PDF document text
    • http://oodow.cn/upload/file/210620044448337868vk16j2nayr03.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/jezodejewedatulakavamiku.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6f3cb3f3d---mosazi.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/suxofosulavapefofuva.pdfIn PDF document text
    • http://divyabodhanam.org/userfiles/file/zawujomoz.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b14cce87f23---giwejiz.pdfIn PDF document text
    • http://cy2hand.com/userfiles/13036383621.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b71e4852c---63411865112.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/tugodunozoluna.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210627125833_1240388246.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/65034152370.pdfIn PDF document text
    • http://luatsuphutho.com/upload/ck/files/82148941860.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/vumogajatitulusojomiwo.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/8a4f6a412aeb068f015f5cef1321be93/10958321704.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/wekoxuvozus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=what+causes+law+of+diminishing+returnsPDF 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_off00014dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAD 11104 bytes
SHA-256: 8bc9d74c9ecf665af8ccb6d2367b873f0171d6e3be0d2d15ea48a5071bcfe437
font_01_sfnt_off00016738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16738 16796 bytes
SHA-256: ce01337258981674f0dfb169a0f70abf68b019e65a86764bb5fdd65675b3a311
font_02_sfnt_off00019261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19261 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1