Malicious PDF — malware analysis report

Static analysis result for SHA-256 95cc7732cf44a8fe…

MALICIOUS

PDF

69.6 KB Created: 2021-09-14 16:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f276f6e42a60f3185951345321985ee1 SHA-1: 99aa2d0fdff6a742b277a44a6f156dffdeefe6f7 SHA-256: 95cc7732cf44a8fe1457da0a80d514f64b2e8585b283f923b499eac5396d5e03
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. Heuristics indicate it's an image-only document with a click-outward action, designed to trick users into visiting external URLs. Many of these URLs point to compromised CMS uploads or disposable hosting, suggesting a campaign to distribute malicious content or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://adaviestransportltd.com/userfiles/file/42569601782.pdf In PDF document text
    • https://eliteplacementagency.com/uploads/files/97899462195.pdfIn PDF document text
    • http://zenithmetals.com/files/60997663490.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/16915536659.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/47674297584.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210902_F135DDDF8F53EB0E.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/30431838414.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/8987623656.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/538813998612fa89e2640e.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/tutozukizadukowexujo.pdfIn PDF document text
    • http://tykhchem.com/upload/files/72359115147.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161398cb44e77a---gujozik.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613cad0e6e030---61646476134.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/29107998031.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/xovemorimolaboluru.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/1779688526.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/79009979768.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/dusizikujipokugoxob.pdfIn PDF document text
    • http://baoveantam.org/upload/files/41868684091.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16130251cb07bb---sidesonedobugarowewugiki.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/vujeni.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/maxilimaribuve.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/23322190070.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/sedemoxoto.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/60624738890.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=best+app+for+journaling+androidPDF 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_off0000b417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB417 10956 bytes
SHA-256: 2c53abb3f3f8d22be99834fff950843ea67168956cc3f7fa6fd67e78c8450de4
font_01_sfnt_off0000cd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE581 14200 bytes
SHA-256: dfba671703a1965c7556625450c5662f2af83757613bff48ca29884120efb944