Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e352663add614af…

MALICIOUS

PDF

79.4 KB Created: 2021-09-21 00:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 47527dbfd263a550ce9995f653db8fd2 SHA-1: 2040b79f6c95087723111b284b9801e45a85720e SHA-256: 0e352663add614af5679c9f59df30dbb8d5830af6b8db3e35be37091ef903be2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by numerous heuristic firings related to link farms and compromised CMS uploads. The embedded URLs, such as http://ambulatorioveterinarioilghirlandaio.it/userfiles/files/kagonuzarulotux.pdf, are likely used to redirect users to malicious sites. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 https://crysiq.ru/uplcv?utm_term=piano+tiles+2+apk+all+unlocked PDF link annotation
    • http://jyjwqj.com/uploadfile/file///2021091315132136.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301267c299b---regoruv.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4tgfitemto8haodiumj13gdvp5/muzukamuwemojimarinizezim.pdfIn PDF document text
    • http://ambulatorioveterinarioilghirlandaio.it/userfiles/files/kagonuzarulotux.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16147bd25c5614---3806952072.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/74047577159.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc1cb4141f---kolojepagivofume.pdfIn PDF document text
    • http://ipoz.pl/userfiles/file/folikeledupu.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/23111484381.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/88278548644.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/73fc67fdfe9fac8557251c8f59914605/90263663267.pdfIn PDF document text
    • https://newfrio.com/userfiles/files/19777804783.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/maxiretitixodobuxawasedef.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/dikimuwozerogibevud.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/merevox.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/tomikufun.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/gibeseviwizejeki.pdfIn PDF document text
    • https://kaimano.it/file/29440762462.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/gagufakewi.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/punodunip.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/58194627146.pdfIn PDF document text
    • https://ku4ysk-9lgp4y.com/contents/files/feleguvo.pdfIn PDF document text
    • 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_off0000d296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD296 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAD 10720 bytes
SHA-256: 08d98947481da0890ed664a0a7ef1248517bdbb3aea9b21f9a8d0a41ccc14e43
font_02_sfnt_off0001037d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037D 17276 bytes
SHA-256: 96fc24d9d1858b11778706029a33948d12d3b839e890ba3e64c9569577ae1335

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