Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb902b422245f6ca…

MALICIOUS

PDF

85.9 KB Created: 2021-06-30 08:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6b7123a2600ad7ac8638fcfff33dcc1 SHA-1: 01c86125d350475739d014b5c53f3b8abfe4321c SHA-256: eb902b422245f6ca40fa78b335195a94843dcd13f6fee4b80b7f04d7b967cb69
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links, many pointing to compromised WordPress installations and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c44feb58017---78194897107.pdf
    • http://kids-ex.com/21775371962.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ego1gsif3cqgp9budc3nqk5el4/78118487100.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2e87ce84ca268ed3d69c0b42eaa99142/jiripukugomes.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a448389087b---67630136711.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7f6a9ca5bf3e31892b400bd1d9d196de/96154741690.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1609519aa89291---nemisuviniv.pdf
    • http://kythuatviet.vn/uploads/userfiles/file/luxivasurogonukib.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/kmcn91or617htphec1a1t2csd2/purorave.pdf
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/rutalewe.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/ad660f0adcb5d9534467e3c36dff7e74/47421421744.pdf
    • https://service-panev.com/userfiles/59294116723.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab30a75e296---7144387284.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097c59912dbc---68704095443.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d0835c9d0---18475688889.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/b1283e42428cf83befbbe8186c946cdc/44381370000.pdf
    • http://www.awakohchang.com/image/upload/File/5812264371.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8cf3ba247---gezozebizufofuluzawew.pdf
    • http://analogsys.com/uploaded/file/108454687160ac98a8d1f80.pdf
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/3mg1h37ftu9lg9a604p6v684qs/fiwonadanawuvasefofepef.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d00f6fb8d---pogerejet.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/u23m95huqhmlanbfqse8ncdmc3/futidut.pdf
    • http://soldearenales.com/galeria/files/jemuladiworurokiw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=naruto+blazing+mod+apk+unlimited+pearls+latest+version
    • 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_off0000ebb2.bin
ffa330f4c8e63c6c12cb23b7eb3017470db35a9d17bb9a6afb6cbd232d28c6f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 17248 bytes
font_01_sfnt_off00011821.bin
6b5d963b2535b8605eede82d6ee0170aaf8613c0885ba177620d27f728d6d568
pdf-font-stream PDF embedded font (sfnt) at offset 0x11821 11168 bytes
font_02_sfnt_off000131d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x131D8 16792 bytes