Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0159556b804ee02…

MALICIOUS

PDF

92.5 KB Created: 2021-09-14 02:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e2cf964815d062a6d78a387a490521a3 SHA-1: cdb04febad53944d945b5f79f88a053b56d14ec3 SHA-256: e0159556b804ee0272641695ebd44d862e4949c2e88871704f08a000ba9a8ba1
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://meuble-tunisie.com/userfiles/file/mababugasab.pdf In PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/tijanosuzapifobaxofuti.pdfIn PDF document text
    • https://www.frontieregypt.com/sites/all/libraries/ckfinder/userfiles/files/tilelozajazijodu.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad83503c8f---vosefizo.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///52159083481.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/95503943102.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/m5uosvm9j45u67oqq377d2movs/36706287509.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/0pb97h857ch54dj19c8mhbd47l/bolupevevakup.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/valasesomaxewumufozumetix.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/fidokososetonomeziw.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/kofitujarazilazexome.pdfIn PDF document text
    • http://midospa.com/upload/files/58087831207.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/baguje.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/9458210326.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/79119269586.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/fediluzodugej.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210901210534350.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///ratuxe.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/witebulezovadafekafuw.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109022129276579.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/nonubutitefere.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/51929992634.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/pekijeji.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/5d20bd55dce6c1746282f5cbf434b2c2/75479623520.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/59109281685.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+save+as+pdf+in+illustratorPDF 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_off0001038d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA4 10736 bytes
SHA-256: 57071146358252be8a550972fc0cf03465f9330237a270e86364ed6f8b6f36b0
font_02_sfnt_off00013467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13467 18344 bytes
SHA-256: 7264d94f21119cdc9497b1d0bda00e08f41d13f04200f15df2f318710be21f9b

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