Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02207dfc04d0047…

MALICIOUS

PDF

86.1 KB Created: 2021-06-29 09:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1eda798e10958cb64124f10ee0119bf2 SHA-1: e1944c85d1d6580fbd6b919f9d9a2227a42fc6eb SHA-256: b02207dfc04d00477922bc2030db3b5249cde38b1ca7f8ffca2e90e736a4020d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of algorithmically generated URLs further supports a malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://allytemp.ru/uplcv?utm_term=forensic+medicine+and+toxicology+for+mbbs
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/0fc24af91e67eea16eb8608b933cb5c4/rivobuwazuvanutedor.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/oq3bigjdjt4ohbtltmt85arsd4/61881997128.pdf
    • http://stylowa-pss.pl/userfiles/file/95095102372.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a78b8b7392---puropam.pdf
    • http://hoanggiaphatland.com/uploads/image/files/81529863801.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609df1b49c6da---49883446729.pdf
    • http://aggengr.com/uploads/CMS/file/1280451829.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160811040574ed---bulujujupefinopebip.pdf
    • https://whitesal.com/data/images/file/1572_20210520081416.pdf
    • https://qnzar.com/files/14880230327.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160957221f271c---pifam.pdf
    • https://quatcongnghieput.com/uploads/files/33124590870.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16079e59ba6c4d---dotajakiberalarupom.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f95c1df01---94057930753.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/g4q7ildomrk1k4jui3d0mdcaqg/faledig.pdf
    • http://saovietgroup.com/upload/FCK/file/7288434766.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/t72s2vie5vig7alesgfkch34o5/16028142539.pdf
    • http://botosani.ro/img/uploads/file/mapuxibabuvazupugipiba.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c32afeabd1---jubugokabifazuvoti.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/780b77e794b0e9ead198135ead4cb4af/32361407231.pdf
    • http://gianphoiduyloimodel.com/Images_upload/files/pufiwizawivapulif.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/42a178918619c8005c19065319fc27df/71741181070.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/d2vlrs0lmtmqrs1evgkkmt1c8o/gowipuxenikezog.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a45bd1daae---8843378161.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb1.bin
ec86ea59431a752db4e1673d8f1877ed71c8f0c1109de1a863e2b7080958eac3
pdf-font-stream PDF embedded font (sfnt) at offset 0xECB1 11152 bytes
font_01_sfnt_off00010695.bin
88019cabe84e7c8243804dd4007c684735636795fe6d7646c779ae331b898b37
pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 16892 bytes
font_02_sfnt_off000132bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132BF 16792 bytes