Malicious PDF — malware analysis report

Static analysis result for SHA-256 f499f47ee45882d2…

MALICIOUS

PDF

86.3 KB Created: 2021-07-06 04:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7a73a932209673e724881e01ade0c7f SHA-1: f1cc903052232ebc27c81c47096610bf293a37f6 SHA-256: f499f47ee45882d20bbe96e7a328837e96a1f5fb590558c33946e8483058ea00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, specifically WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of these links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/83108ccf2e8c7541d40b2f602d2eee6c/48379805507.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd8047f61a---95204635972.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/s68n9ulpq3734r0l80ccqqed0n/24210264446.pdf
    • https://trvstore.com/userfiles/file/20491252304.pdf
    • http://msinziniering.com/userfiles/file/nojeposijiwuxuxusirexopis.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/87fe2e1e1239ac33dd389b872e05bcce/kexividoj.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc9ac0665c5---rejubobuwadosugizuti.pdf
    • https://allcreaturesinc.com/files/files/55739325541.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/o9sa29a82kfet2ikpc30e2hh15/54051256634.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/6a974dd73a166c39c4121a28d7c424dd/joxobijijedinemezuba.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961c959da7e---xobivutimapitaxekele.pdf
    • http://boothbayharborshipyard.com/userfiles/file/83384037271.pdf
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/23449146822.pdf
    • http://cdmatik.com/uploads/file/47508445324.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881cdb805ec---91254428826.pdf
    • http://barsugo.com/ckfinder/userfiles/files/wujavavofitugefukada.pdf
    • http://parkhigh65.com/clients/4970/File/fepomeremum.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/evaj26v60if1h8f6nvk2fha6v3/xoguzibigigididejizidafaz.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c235b182204---42459769066.pdf
    • http://henri-ruch.ch/doc_pub/file/gupurimixabi.pdf
    • http://miroslaws.com/ckfinder/userfiles/files/38330899952.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095cd5b50b10---megivumopubowosifuwumadux.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6a115d96e---juponovitapipev.pdf
    • https://situsba.com/contents//files/91763334523.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=pictures+to+draw+on+wall
    • 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_off0000edfb.bin
b73f6c1c33911b2c0d253107bd2d7943413bfdad67c61429e8974dd3764a6ff4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 17440 bytes
font_01_sfnt_off00011b93.bin
744947a0008ddaf4883af7cea28c09d7e86d8a58ad16b74aea592ca3e9d3dfa5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B93 10552 bytes
font_02_sfnt_off000133db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x133DB 16792 bytes