Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aab47c09f40d4eb…

MALICIOUS

PDF

110.9 KB Created: 2021-09-03 07:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 22d50b13d812632b958639ba6ea22088 SHA-1: 8db75a1bb23b7b0eefc804853b807fce73b57a66 SHA-256: 2aab47c09f40d4ebb6ecfd0bc89b044c422cd8fc731c183579f4cce892fc9238
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, likely to lure users into clicking malicious links. No scripts were extracted, and the document body was unreadable, but the heuristic firings strongly suggest a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9813

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://cructi.ru/uplcv?utm_term=bakelite+uses+pdf PDF link annotation
    • http://tamker.hu/userfiles/file/99929348153.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/f47aa08389f7e725cadbad033900a831/48717947700.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/telazovodibenukigagi.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f1c98f6723c---92363646323.pdfIn PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/3572665448.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/87602810588.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/670bj40rrfh63bgc1sk23drg9u/21965250041.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f29636466c---82120701412.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/koninejaveropajogi.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/35fmtmi4qr71gn5mr0nfbv5cag/beromuxip.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160b4253675e4c---filetuf.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d31e11814---wedemu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb3bf695ab---wulidafetinuxupinuneni.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc45a73ff8---papapigunuxupusalebutose.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/gixuv.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/64799958501.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c40be6306bb---xekurodobu.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/083f52ef3f52731d773c165a5f15f739/93793881810.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/degela.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/pogalotafomadikusunowujur.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/polibuwojawitoz.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608312d380edf---32580261644.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609463b7a54c7---lewobid.pdfIn PDF document text
    • https://namphuctourist.com/userfiles/file/xopuriladitadib.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE5 10412 bytes
SHA-256: 8261d3cc09e9da1285145d627202c51cac5b9c568f734daef7b4ebaf9fee2ecf
font_02_sfnt_off0001429c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1429C 1832 bytes
SHA-256: 89da79fee6d37be19f6db06c46d2a8446732d632a034d3c2b56f2b663556bd9a
font_03_sfnt_off00014b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B36 30180 bytes
SHA-256: 2ced8b66d96a32df437ff7f8c95076d3fbb8bb14f8ad3cae2c1d0c4a49bf8ca0
font_04_sfnt_off0001968b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1968B 16328 bytes
SHA-256: 4d2c979e00d7f07568ace6c004087dab3910a10aa29dafde65c09193be7d4815

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