Malicious PDF — malware analysis report

Static analysis result for SHA-256 7022011b4718a5b2…

MALICIOUS

PDF

93.8 KB Created: 2021-07-31 14:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 265de00fabca928760f2cebe33e4b9a0 SHA-1: 48d408cc51274042f74c062620bd8a70f6f4cd40 SHA-256: 7022011b4718a5b2baf96f0f1ad0f8dc10d8ee4f31e0e4c4fff3afec5b367116
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable domains, indicating it functions as a link farm. This is a common tactic for phishing campaigns or distributing further malware. ClamAV detection and ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/91800fb8533820565a5077a15b680040/dadevazoxuxuj.pdf
    • http://solarhomepage.ch/fckeditor/editor/images/file/nokirijinax.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/2154ff5f77f435f9c4b59904ae01a98a/jikebefukorisikanowes.pdf
    • http://akkoryazilim.com/userfiles/file/pelodadibegosu.pdf
    • https://chptravel.ir/data/file/3478661046.pdf
    • http://aarogyamedico.com/userfiles/file/jebekolo.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/cee5969bc9c4070d8a455182045b5300/4847699578.pdf
    • http://kochamsushi.pl/UserFiles/file/kiradilaxefimupe.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9a226bb1e---vudavilogugezutovot.pdf
    • https://pet-fashion.ro/mm/file/gugusizoguluwotojetuzexe.pdf
    • https://cottonweb.net/userfiles/file/kedegudoje.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160831f60d656f---bitodivojopafifagok.pdf
    • https://bdcomunicazione.it/file/86308533075.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070490c33671---88360084421.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/55ec6534db985284d8cca81b76000828/52931990613.pdf
    • https://alternativecarrepair.com/userfiles/file/8388834851.pdf
    • https://akapacha.com/userfiles/file/loriporodovilifig.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/7e7f0e37387c349ee004a827642b3cce/sufalasijerikuboxuwize.pdf
    • http://ansonseatery.com/uploads/files/lowijawiwilepilil.pdf
    • https://kis-u.com/page_data/file/20210620095949.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/6aba4135cf9619f768ac6de132016347/vitasureragemazex.pdf
    • https://presstone.hu/userfiles/file/81588907557.pdf
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/vijejizefip.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=carta+para+mi+ex+novio+en+su+cumplea%C3%B1os
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbcf.bin
e594c5d393871ff95c79466d4e842cb591b88d218ead677064f1550889da2868
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 11040 bytes
font_01_sfnt_off00011546.bin
5b3c947262022625ef2d4cfb2d0fa10a94f23c97611fd4c7364bfcc62a76ce6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11546 1732 bytes
font_02_sfnt_off00011d7a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7A 16792 bytes
font_03_sfnt_off0001358c.bin
ffb28b7d09e414b509d04357a2141b963431205aadc67372179c02d686c8b141
pdf-font-stream PDF embedded font (sfnt) at offset 0x1358C 19484 bytes