Malicious PDF — malware analysis report

Static analysis result for SHA-256 807ae7fe01229945…

MALICIOUS

PDF

76.8 KB Created: 2021-09-04 09:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b0ba8cdc00425a36beff7c947d0ef5e1 SHA-1: 7cdbe1730647c0ddca230e4c29308e84cd9ed500 SHA-256: 807ae7fe01229945fc48b7c5f917f2d7eeddc98b5bac184163f1634a4610f6dc
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs that point to compromised WordPress uploads and disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic for SEO poisoning or distributing malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://inwebjor.ru/uplcv?utm_term=daikin+ducted+air+conditioning+manual+brc1d61 PDF link annotation
    • http://kompletucetnictvi.cz/files/file/40224694628.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0ef1b08e1---vejatev.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/43802725928.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc94314930---94641324301.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/98314392439.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/pawogelumudew.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/95100899485.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c48e2c34e---veradulu.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/lozovixusugalimesifu.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/ca26a8cda5f5e9b15dbe1a38e95479d4/40462256865.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8db12bef5c---34481297875.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/32830154782.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/vurosedebadabuniwuxojupe.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcce6c04c0---43625267658.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5df9ec9771---lejasunomo.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/rivibetagobopokuvuvap.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/gutitojemokubi.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/12618980675.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160cc14d3cc1f6---60018607217.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/kaxijikomimiwukaf.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c21f90a58ae---mipexofubef.pdfIn PDF document text
    • https://luminex.pl/upload/file/subupijelimalulomizenu.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/98886744956.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160843309ee716---lojiwujopu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7F 11100 bytes
SHA-256: 49b564ffb6c5a595686a88347c9050643a6b83699218610b3b6a95b9657e38d0
font_01_sfnt_off0000e429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE429 16416 bytes
SHA-256: 86644d6830cda23fb3cbfbeacaa974cd2e52fd374a13ab48bb21558de58aa32e
font_02_sfnt_off00010d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.