Malicious PDF — malware analysis report

Static analysis result for SHA-256 c030ac37397b12d0…

MALICIOUS

PDF

83.0 KB Created: 2021-07-07 14:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: beb763f2082860c1d09c6699fd750bdd SHA-1: 8cb8ff1979bcd31b33c00ba755c5330b35f83333 SHA-256: c030ac37397b12d0aa0690286111490eed9ead25413a318c906bb61080131e8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://allytemp.ru/uplcv?utm_term=convert+pdf+file+to+excel+software+free+download
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/c10b65277e21e87c56995f22392585ab/falulu.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/595d0d3494a4dfe5a643fd35d27fe609/lafekaxirepawaxikubim.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e2f088f31---dakekokazuvosubemomamebuz.pdf
    • http://jhdljz.com/userfiles/file/1624864715.pdf
    • http://pechati-piter.ru/userfiles/file/fusevuxa.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a6e83643d---niwakexoferu.pdf
    • http://oasis-inwaste.asia/files/file/96256201624.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609336657d0df---nukifemogabawivu.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b1f207d80---xojuvagezitosowavo.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608676a80d7a5---bogajejanaxomejig.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7b0fa82f3---xisuwilodag.pdf
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/gukewuge.pdf
    • https://advantagelic.com/singhania/downloads/file/26741533013.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c926cad1f43---15058987361.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/64115547311.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/sp6ctggknbj7b8d64ka534hu62/bozen.pdf
    • http://baraanduliaptti.org/userfiles/file/74312598535.pdf
    • http://onlineticketreview.com/images/file/10782107107.pdf
    • http://www.anclupnapoli.it/userfiles/file/17207986237.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/10e9c8ce797d2d10cfdf12d8c84429c9/26360083766.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/nquhf749svqb5vhood1vf9ftg6/jexobilanagonifimezeg.pdf
    • http://toyotarent.kr/FileData/ckfinder/files/20210530_5AFE77AFB12DE0BB.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16079f7e03d455---xejagexuga.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/hnsdcm1t2fh3psmm0ig077f9t0/wexilidofupoxub.pdf
    • https://carparts-fixture.com/file/file/bisuvar.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_off0000e113.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE113 16792 bytes
font_01_sfnt_off0000f92a.bin
ed3e06aebc4f20f97a7909013e3a3ac014da6ad33a788987acb5d4d388b16f19
pdf-font-stream PDF embedded font (sfnt) at offset 0xF92A 10896 bytes
font_02_sfnt_off0001129c.bin
2b87ff4b891b4d9ec5ee98fa2cd9cf8c3717da13f4202e69a85d9941025bbda0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1129C 16732 bytes