Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b67fd033c053cb5…

MALICIOUS

PDF

73.9 KB Created: 2021-07-17 09:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f8aa8a79bf48d23c7a23d4d77721971b SHA-1: 19925c4549276a383260cd4e45213319a1fdcd60 SHA-256: 5b67fd033c053cb5565f3e1ea7e5c766a8869aa0eb0df491911c799969f0eb60
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a 'download' button lure further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://e-kva.ru/admin/ckfinder/userfiles/files/vekiwapekomota.pdf In PDF document text
    • http://duetsepolno.pl/userfiles/file/fufak.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/mezutusasaberivus.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/38673979940.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be669a3733b---50757429227.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/23925526016.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/0e7bdeb77e2f18a01713d885cdaa7459/88349833195.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/komarunerutexeji.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/4355f1281a9518f6bad4de922c15c7c1/58664391555.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/menonomozozurul.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/cd0b992e85bb4804b1adf7a6e4dddf47/26445164881.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ea7441ebc---74578304362.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/04b1da402b08735273b11b4271d41573/29336761821.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/kamuzogizavisixigun.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/mclud9acu17p6tq46rm3625jsb/tazenijupamomedubem.pdfIn PDF document text
    • http://slippersymposium.com/clients/875641/File/74025407708.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f040d5ecdb8---waxopegatugatoganowijaka.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/79509839155.pdfIn PDF document text
    • http://vlajamo.cz/images/file/dixidomavokulida.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/vq17jabv71mrkoc2ldtcnics2o/watopitavitezukatu.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25b84b52b8---3001092727.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/f8m9a6dr5qdpgebfja73n8s0nh/dixagoronebojemi.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/4e020e1440ea561842ac847875e288f0/lexazujolafogowukapizov.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/0430a5b0bb84f695335d675c55875de5/ligimexapeni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=the+secret+life+of+walter+mitty+questions+pdfPDF 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_off0000bda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA9 16528 bytes
SHA-256: 3f7b363c0baabda382504a3d1f8fa57ddc5516cb95b06bb2aa1fe0e6e3992882
font_01_sfnt_off0000e7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD6 11296 bytes
SHA-256: 7839ca81a074559cff1ceed05882f99b5914906fbba4765d643c720c9f0711eb

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