Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b2ab8e8199279c…

MALICIOUS

PDF

70.3 KB Created: 2021-06-29 04:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77c8621e7701b28e482bad0199af52b1 SHA-1: 36fa91e47e590fb401484b64d92a101f1a8b7934 SHA-256: e0b2ab8e8199279c263a8e933a4dfda52eb8a4945d5d950095d495cc599b3da4
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The PDF structure itself does not contain executable code, but its purpose is to facilitate access to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/5febf0dc6b85fcf99073ef114081cc16/39731447027.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/i1mt8gj5vlojc431bddjdenpu4/311458548.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7aa27a2af---sevurepajuwabowusa.pdf
    • http://bhs76reunion.com/clients/e/e7/e717e6e8e39ea4daeda922698d41f3c9/File/34572492229.pdf
    • http://juha.be/_files/file/49916510481.pdf
    • http://vietthanhstone.com/images/news/file/gejesidirewoxodan.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2012c9182---kemejuxubijijumur.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/ed32a98a2eebceacd3d215c631910ce9/gegidafewuzuja.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/fb55cb7814705f087bb64784c4a38853/desebotezalabevevek.pdf
    • https://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/2b77de2d2d3de25f819992bcd58333ce/86280796121.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a9a421585bea4d666486787720321372/67542671842.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/pgb1kpi19o6gfnk73tcn4jmcgf/sipeberutiza.pdf
    • http://boschvietnam.vn/files/usersfiles/files/nenexibuwuvozuk.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/h3mp81oood5fsfrd2n1kf1smjo/noxagunivodivosanuriju.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/bf3185313dc305e5da4dca1aae8a18e5/40206963673.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/ee2079a0705ee4fe4262692fccfa953d/6059284369.pdf
    • http://imbirimbir.ru/files/47517368054.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/7vfg2i0ei3gplfj8p99mbiba14/89430929843.pdf
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/45a8faf55ca26f2f063a7dd2de4135d0/59180862845.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42aece4345---wawaxomuxugomifigakivutef.pdf
    • https://yorapp.it/file/febuzitexamosonu.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160783dcd044d5---59123698253.pdf
    • https://yellowstonewildlife.com/dugix.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=rally+in+car
    • 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_off0000b7c4.bin
b10d666a3f029cc96143aa4f4322810a38a45380376b61677a07b8086e4f29c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C4 9864 bytes
font_01_sfnt_off0000cd80.bin
af64a08d2fe3032d8f757c94d2dc7e97f3afc72380ebed03119cbbd285c3de63
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD80 15268 bytes
font_02_sfnt_off0000f48c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF48C 16792 bytes