Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af5680cff8d61c3…

MALICIOUS

PDF

82.7 KB Created: 2021-09-19 23:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ef02645ef915fd1c76c39bdf532c2414 SHA-1: 78845ff8049af9cc9f84b7cae37f2a4cd4bb810b SHA-256: 6af5680cff8d61c36d018f15a748f7649b6487d81adce99eac442328e640f5e5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The embedded URLs, while many are marked benign, include several unknown ones that warrant investigation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://uro-medical.pl/zdjecia/fotki/file/91460571972.pdf In PDF document text
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1631805443.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/44079865681.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/wuragupekejunokulo.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/161476eaa5c5e5---zogarimixurive.pdfIn PDF document text
    • http://myphamasia.net/upload/files/ripoxoxu.pdfIn PDF document text
    • http://ping-property.com/user_img/files/palulolenemufasakefeguda.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210906034518.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/75861295604.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/zuvimawezum.pdfIn PDF document text
    • http://floridare.ru/app/webroot/img/uploads/file/131506_3582299907.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/19845319056.pdfIn PDF document text
    • http://lse.hu/userfiles/file/negijuvevip.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/kudamamekilubufe.pdfIn PDF document text
    • http://ccadl.com/files/20210910234625.pdfIn PDF document text
    • http://pyhunlian.com/uploadfile/file/90418855115.pdfIn PDF document text
    • https://coluer.ir/documents/file/93512452641.pdfIn PDF document text
    • http://webmba.fr/client/logo/file/79285337667.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/64073888210.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/38633371509.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/4facca3dde48c39adea5343ebf94f244/wakofurizovatelud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=view+instagram+private+account+freePDF 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_off0000dc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC93 10996 bytes
SHA-256: 0929fd06b20ff2b24673ca3b44594ed3dfd466c06cc0579f90f97f8c4582a383
font_01_sfnt_off0000f640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF640 18168 bytes
SHA-256: d8c6bebe7c36664c231f2cbb07001ef9f5f351f8e26aed97633ce420866e5cab
font_02_sfnt_off00012528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12528 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.