Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e01988d6ef1b45…

MALICIOUS

PDF

91.1 KB Created: 2021-08-02 23:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 9e27caf55a6c28d0bffe0ffafee0df38 SHA-1: cbc77a22407cecca0daafcc9aa471f55bef4e4a0 SHA-256: 02e01988d6ef1b4503a9d178f86b575fa7d76d4503b2ae19e0a1b270463bfbc6
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to compromised or disposable hosting sites, which is a common tactic for phishing or malware distribution. The presence of multiple unknown URLs and a specific ClamAV detection name further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/15rojabrr88705mrdm08d27bi2/bosozijipafatixogop.pdf In PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4892862770---34901360054.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc747e9f9a---fobafoneled.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/faloxotofazigavekoli.pdfIn PDF document text
    • http://www.papelerialapiceros.es/ckfinder/userfiles/files/dinagupadotodewuna.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/sixudopig.pdfIn PDF document text
    • https://littleitalypizzany.com/nbloom/fckuploads/file/febol.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c928368925a---tubenazazosegunolago.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/7fc9b6f3b5970ad10943a21be8f5a137/20692359331.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/99414888953.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/43211899670.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/ac376382ccf46e2644cccd0ec78955ac/73737769198.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/rnorlmh20pf5udmldlilfvo1bd/pesipiberisaji.pdfIn PDF document text
    • https://pindimana.in/uploads/file/86842653249.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210702095118_dux9lh.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/lakexulid.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/drtd6facb8gjbra7qrc6j3u6o6/32129668901.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/zeganavika.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/61b018baa15f1a54e31c3848ae0333b3/kokug.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ktq6skjbmbrlm07v6mv6vph5fl/lamipimavunazomude.pdfIn PDF document text
    • http://afro-safari.com/upload/files/gasixutokitaxujeradakew.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/8740489524.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210510041430.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/07decf6575b4bf7a4dd16e25e56e0044/96477487711.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160812a7755c2b---kezikamakajezenode.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=cisco+packet+tracer+configuration+commands+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_off0000fd2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2E 17564 bytes
SHA-256: 0dc320720fdd63a1f52ffbee173bb29d476e7d71202bb026c6a9639db0c6eb4a
font_01_sfnt_off00012b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0F 11140 bytes
SHA-256: abd4263c739de5eb6e8d8b12a1aeb6bd1f619e67e9b01ed155cd0fd21ce2c8fe
font_02_sfnt_off000144f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1