Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02916dd06bb6df4…

MALICIOUS

PDF

81.7 KB Created: 2021-09-20 00:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e06e33bb797b434429bedd3747f22853 SHA-1: 0887cd3dfd936c1e98c0e6c6849d4b657b4cdc96 SHA-256: b02916dd06bb6df493a989df5800586191638d2eec0939cdf5a1a8ce4c5ecd23
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' in some URLs further suggests a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://huntic.ru/uplcv?utm_term=lovi+app+video+editing PDF link annotation
    • http://antitumor.org/filespath/files/20210907023118.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/talizazuwafigiga.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142734d390b8---xobiruzositifabe.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/34658565679.pdfIn PDF document text
    • http://dar-tom.pl/userfiles/file/83401412658.pdfIn PDF document text
    • http://bikaji.zohukum.com/ckfinder/userfiles/files/233268405.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161363398148c9---labasifutuzo.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16140703ae59be---2989062578.pdfIn PDF document text
    • http://wideanglepackaging.com/ckfinder/userfiles/files/kexuzepevinasuzadazofa.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/vanegarijarokujibaxawuj.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613415a56dfba---vivetozisetilodevidigo.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/94956882070.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c8rl4ccuckrmiuni11j2q2mvl4/89882432272.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/93492128456.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/61447884052.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/72089625574.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/90889159048.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/76513655816.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/48951688612.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/49299314460.pdfIn PDF document text
    • http://imhang.com/fckeditor/userfiles/image/42395524597.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/88229803473.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb2de72c27---85236087217.pdfIn PDF document text
    • http://vektor28.ru/userfiles/file/60342857177.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/58807981173.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402a048d884---9912607931.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/tokejimugoz.pdfIn PDF document text
    • http://kehlux.lu/userfiles/files/59280219230.pdfIn PDF document text
    • 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_off0000da18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA18 18416 bytes
SHA-256: 41b28e12e2c2b4dcda52a2f2cc52ce33ecd5e267e548b71419c5e791eb20bb5e
font_01_sfnt_off00010a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12242 10276 bytes
SHA-256: 0bc347fc168758e3432b5d938c1d52ec9a7419958b19690016412c1eab5bdb28

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