Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e7a593802e29f8…

MALICIOUS

PDF

86.9 KB Created: 2021-07-01 09:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aba75bcb422cbba78b18a1171317af35 SHA-1: c7ba330156c176ce6951f61768bb4bf1f9f363fa SHA-256: d6e7a593802e29f896c8fb2a3671aee44e7911014208937322462cb92c5ffb17
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://medvor.ru/uplcv?utm_term=cats+paws+after+declawing
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/f1e812d792269007c23330110a0045e3/nakizebofow.pdf
    • https://gachbinhduong.com/upload/file/kirogufawisupoxilole.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/d7nktgatnjuhepu6q13o1q98uu/89323566666.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/bidojebobukodur.pdf
    • http://elite-nails.pl/Upload/file/wowujosamafeporolum.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c04ae46cd78---bikelosategibaki.pdf
    • https://eyetracking.pl/userfiles/file/lejewexatemafopubifibo.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/dd45g0mgq345qhi7h3kbfqdt1k/14029678966.pdf
    • http://enovosti.info/ckfinder/userfiles/files/pefuzo.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/1d507e017cb14eaf68cc1d8a91a7d0ab/fukudovak.pdf
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/75639698034.pdf
    • http://2478.ru/admin/ckfinder/userfiles/files/74092870356.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160925c38a389d---32451751876.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16080d5f38a11a---zebebobuwegazopuxokawuged.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098add4bfd11---kizetevexixifowalij.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/hfd4nubh2i8vg756s4jvg7gclg/durimimo.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/115b1cc81c492ee1a3a5db149693ffff/22312925113.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/444625d37c3582299ad1a7c1e0d3941c/solemato.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/d50e4282b782047b9d35b52ca58ec915/95482260069.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/1mhqkt6m708u3q7ahu2kholgdl/23300553758.pdf
    • https://marblobaths.com/app/webroot/img/files/tivapomegi.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606d91e21efeb---zomujaninimobog.pdf
    • http://artecgroupservices.com/imagenes/file/biladorajelulinat.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_off0000ef36.bin
487bf5dedaa75d6f4f9ed19e6e0122dd358837ae2bb5a4366af3ef3530f34b4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF36 17368 bytes
font_01_sfnt_off00011c57.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C57 16792 bytes
font_02_sfnt_off0001346e.bin
126f2d8e37c89937b63ad34a0b23c9ce06f3aa869da24fe236e3e04faca927da
pdf-font-stream PDF embedded font (sfnt) at offset 0x1346E 10792 bytes