Malicious PDF — malware analysis report

Static analysis result for SHA-256 7384665647f6ae35…

MALICIOUS

PDF

101.2 KB Created: 2021-07-29 20:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 32e8db3b8db129adb53c578f49143a13 SHA-1: 36580be8d86f308aad56a15866af9de8ac30f635 SHA-256: 7384665647f6ae35b20c1bc2defcdbcdb1e765105f9411eff69819e344dd148f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs are indicative of a spearphishing attachment, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://ketchas.ru/uplcv?utm_term=dragon+ball+z+tenkaichi+tag+team+mod+budokai+tenkaichi+3 PDF link annotation
    • http://boldogelet.hu/media/devuwowemawalulutetunibu.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/66812208670.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/40845856327.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/3ee95b29d0a63ac783f2a53a03031c39/5318939083.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/dufekifajoxivedutu.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/dumupijelagikapaxiluku.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/c377542065b1946daeb44fb3213f20dc/mameziwaruzixekuzapara.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c93ec4b082c---limuradoxamivuvobevekirab.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/5450712986.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c79e7b439d---welaxawixupe.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/fukowonojinebejuxepo.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/xuxop.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///zurowekunakinolebar.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/lasarux.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/wenaxe.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b27627e12---xilekarudamukufavuj.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/0db065f565764f9aa20c0ef9d45c68b5/28513734859.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/36d0efb1dc44fad4ad723b5ba053b77c/56611302511.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/rujowijabiginisa.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/revufibodigimoxawapuzezad.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/melubodufixamo.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/2a2df80d0902c4abbc891501439b16fb/gipojezodorijuzaxogaluwa.pdfIn PDF document text
    • http://mp-journal.com/media/file/rakumametubukase.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/74411225631.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DE 11212 bytes
SHA-256: 9994e687f25e023e1dc417d1c914c65fad744a71156cea50276ebfeba6f680da
font_01_sfnt_off00012fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBD 18648 bytes
SHA-256: 4c860fa486988b7786d63694a0b70f7a17e4418188823841c9d927f5b03c5120
font_02_sfnt_off00015fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000177ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177EF 3444 bytes
SHA-256: e012ca45c7bc1a46f66020272c48a5e211b71196cafdee0acabca4b858bb2a5d

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