Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ba7572fbce7b3d…

MALICIOUS

PDF

90.8 KB Created: 2021-08-14 01:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b254b5b3ba282fb2f7499907b6b00e28 SHA-1: 6b369ecb14258a77c5d0d1e3d83e225cf6a56a81 SHA-256: 67ba7572fbce7b3dd7dceaa7e724c4975e52eb1516a3b45473c425d5a91ac1ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a phishing or malicious redirection campaign, as indicated by numerous embedded URLs pointing to compromised WordPress uploads and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to external sites for further exploitation or credential harvesting. No scripts were extracted, but the extensive link farm points to a deliberate attempt to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://laborke.ru/uplcv?utm_term=how+do+the+fruits+of+the+holy+spirit+help+us
    • http://studiodugnani.it/userfiles/files/17795425115.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/5474ddef234f94094cf525d748fb54af/lukupaganuselejiv.pdf
    • http://ptaki.info/imgekoprojekty/files/rapewu.pdf
    • https://fajanav.com/aym_image/files/joxefolex.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4e381051b6---gikelito.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0202dc4aa1---29653400893.pdf
    • https://lifo-sea.com/ckfinder/userfiles/files/4429500209.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1492726de---44329877535.pdf
    • http://cbgnfinance.com/userfiles/file/1913028774.pdf
    • http://spielundlicht.de/content_provider/documents/files/1122007535.pdf
    • http://berbun.com/user_img/file/dikegeribedopiviburab.pdf
    • http://staples1981.com/clients/b/ba/ba027a536d51c1d997ee76cae6dc9017/File/98573594979.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/5cdfa71af9075bd57512275303f1ec19/datogopozorigotafup.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e03e3505b---10351634672.pdf
    • http://huucodatlanh.com/userfiles/file/zinagupimi.pdf
    • http://goref.ru/files/file/48233981184.pdf
    • http://didopack.com/files/vevojomadunopodosudile.pdf
    • http://chatfieldfarms101.com/userimages/8120074042.pdf
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/t4pi9cgpcfq6kimbl984g0djrp/vivelezaru.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607417fc2cf5f---60238672339.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769522637cf---55501014883.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/63848061b9759f6cd790c293aded5d3d/27811913990.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b4702da4b---renefagej.pdf
    • http://feynburg-uhren.de/uploads/nivenopubesaxu.pdf
    • http://ptaki.info/imgekoprojekty/files/15177621657.pdf
    • http://j-club.eu/userfiles/file/vesogexevi.pdf
    • http://tnetimes.kr/upload/file///64560162533.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbd9965f4e---podiwibireroxibexun.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_off0000ff7d.bin
91ab26ff792baaa7f54e4cbf06389d17f152b479f481282cffcba6037c21f748
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7D 16260 bytes
font_01_sfnt_off00012985.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12985 16792 bytes
font_02_sfnt_off0001419c.bin
6239c3c6855e22e05962050cd969a5fd19a47cdd76a2472fa8e423a228a3b7ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x1419C 10620 bytes