Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0103cc4001a627…

MALICIOUS

PDF

76.8 KB Created: 2021-09-19 20:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f09d0ebf971d3ab0ad52e82c4b924b79 SHA-1: 446eace228609ea2f42bcb08c038df4f64d93813 SHA-256: 7d0103cc4001a627eb0e596d77ad961c010192a26330dfdf5241e9d0de7150dd
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload directories, suggesting it's used to distribute further malicious content or phish users. The presence of numerous unknown URLs reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0be8cb7c1---27870047481.pdf In PDF document text
    • https://oriontradecom.com/ckfinder/userfiles/files/sabavu.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/renedolopudub.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/zirugam.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/fukofoxole.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/vipepumo.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/58807837980.pdfIn PDF document text
    • http://agavietnam.com/img/files/xezenoduto.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/27220071060.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/558d6c3733f25877da7c5f07a7296860/fisisosubagovef.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/a256786828b66c2c31076564d0d5e1f6/buwopowekulozapowezunan.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161389f727f707---dabujoronidije.pdfIn PDF document text
    • http://kcemsp.org/upload/editor/file/80333029159.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/garurobozijilemopedora.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/borudoxelovalukotuvesib.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/lafalorululofoginimosena.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161428965d8ef6---83255399061.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/vukunuresotokipubobiva.pdfIn PDF document text
    • http://tabletopad.com/images/file/39808666263.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16140628e4550d---96604477624.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/goxipamozulop.pdfIn PDF document text
    • https://producto.works/userfiles/file/zekavifelapaw.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/zovuvakosufebo.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/8877277378.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=droid+optimizer+premium+apkPDF 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_off0000c6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E3 10488 bytes
SHA-256: 27866ab28b1ebaf302338fa880e94cdf19991f13f3d076517180d4011c5a12c3
font_01_sfnt_off0000dec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DA 17828 bytes
SHA-256: 508a6c55b9af8d7992dc86a1e67c0faba2da1004035922ae21a204150a4e3c25

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