Malicious PDF — malware analysis report

Static analysis result for SHA-256 0429dc65f215957e…

MALICIOUS

PDF

104.8 KB Created: 2021-07-03 08:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c0d5af46c3b53b9874b442e7af55f065 SHA-1: 193c65831ea735c2c2c553ec42bb2b3686f6a56f SHA-256: 0429dc65f215957e6ef43e2c4db477903b9052513a0f79e7fabc70fb9d805430
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised WordPress installations, suggesting a phishing or malicious redirection scheme. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, and the document body was unreadable, limiting the analysis of specific user-facing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9747

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 http://mppscstudy.com/admin/usercontent/file/62179745487.pdf In PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607455c6394e3---39132971236.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072acd05bd29---fepazopemosekepipet.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/84437871370.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee0af3f107---tibumipegezobagazaxuge.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160833d355a2bc---96354931822.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/18d506278b593511d2095ee17bf01503/nixorulon.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/09322220eb011f91e09a738dafd44d6c/44070378080.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b83c67c4560---91120421179.pdfIn PDF document text
    • https://medtek.vn/storage/file/raboxo.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/gbefjaconcie3iu650bmlqv0s5/3565021424.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/xofajuta.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c13f33e97b0---61474242470.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/85795094841.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202106/file/1623501049.pdfIn PDF document text
    • https://kede.org/userfiles/file/perukulekadow.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d6472f063---zusatodutet.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/cch6hdtlusni2apeggi8s2e7f0/vuzoxexufumanenikug.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/86095371718.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/84a1aa4da8e7c91b225b8d4ba37eb38f/24227323395.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210703090938603.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/574ab6d7572d3d6e117a6653397b7719/87174954996.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/zixukawureramexifusol.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792726369e2---84461156017.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/gilutewukiginesugin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=manifesto+meaning+in+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013f30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13F30 28476 bytes
SHA-256: e077ff8c643be8156547399c4ed4bab48035624966d73bab1160e0170e34f0e2
font_00_sfnt_off0000eb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AD 23844 bytes
SHA-256: 183ac610c972b935557d6fda27e5cf8d448a6004f2da5b184267bf9d640b3188
font_03_sfnt_off00017330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17330 2188 bytes
SHA-256: 5dcba2aa55c1a82f7ce363587c4b7bdb64d0bc5fa702d37185f42f6057967bb2
font_04_sfnt_off00017cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CD1 10552 bytes
SHA-256: 8d781bf233633d44abc19dd9f14dd096eb198663d41786c275628c8c4e525124

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