Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b0583b317b41d2…

MALICIOUS

PDF

82.7 KB Created: 2021-08-07 03:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1bbb808d1ae47e0be3a01a3c883ed3dc SHA-1: 64f56d27a3209452abc9e140db3a12a5eae64e93 SHA-256: 01b0583b317b41d204085b4b12f2dd4c14d33cd468e00c39e6fff0763e9004a6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites, many of which host PDF files via vulnerable WordPress plugins. This suggests an attempt to exploit users by directing them to potentially malicious content or further download stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d88c1dd27a1---jemimatojajowupedekunop.pdf In PDF document text
    • https://edinburghpools.com/contents//files/68008722289.pdfIn PDF document text
    • http://gabortech.com/admin/file/gomigemuwovu.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a35478231a---38095233656.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c11890d4f7---punotixifisofogemilo.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/a6a444ef2f76e532878897a99deb975b/fumetesuw.pdfIn PDF document text
    • http://touchpanelpro.com/upload/files/joforisujoje.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c881268d512---gelabot.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/jagivakipaboboguraja.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/vevixoridifonuworakuxebe.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/50724275722.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/vo5hpiu8l4pbhefa79s1sjh2j1/61759079708.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/runabaluxejelazijema.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/fejabaxeku.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/48123433997.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/varilelowesureputuxit.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089df840ef6a---gekofakoxijopudedenupeja.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/vebudowipekiv.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad53af4b90b---50643616298.pdfIn PDF document text
    • http://locum-system.pl/userfiles/file/98773305872.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/408dd63fa66967234172a50091932df6/36004779757.pdfIn PDF document text
    • http://jarosi.hu/files/file/32227391448.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf014320fad---22030342636.pdfIn PDF document text
    • http://luyenthidhcanhsat.com/Images_upload/files/50027480937.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/2b4gjv6u0q0u5coh2e8llan2ri/wivatosinuturamupite.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/61967064751d403e9c679912e2d1b18c/67859159760.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/lufejijavasakuwobo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=mera+bhola+hai+bhandari+remix+song+download+mr+jattPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD907 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11E 11148 bytes
SHA-256: fbb7c90178aae685ae5319c321e3ab04dc3397b7e1716e3b776149f6add14705
font_02_sfnt_off00010ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC3 18320 bytes
SHA-256: 3eea93f756d366a91555894e756420627408bf0b88a2c118c0f6c792404738f2

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