Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b4274502069d01…

MALICIOUS

PDF

76.7 KB Created: 2021-09-18 22:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6c296ade86e6cd8ad091a00d5efa3351 SHA-1: 316c81760d72ff31ef6ab1341d0dfc05caa9b4cf SHA-256: 05b4274502069d015d7790621a49aa1040dcf6a044a019e62747df10e115cfb6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. Heuristics indicate it's an image-only document with clickable actions pointing to external URLs, many hosted on compromised CMS platforms or disposable domains. Although no scripts were explicitly extracted, the PDF structure and link farm suggest it's intended to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 76 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://zaun-produzent.de/userfiles/file/xepak.pdf In PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/fce22e9e8e50f1c1f57e5cca47d06d88/62576127716.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/nevuxukufetesalox.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/45ko922ke3tuue0ceki81tss22/fubamejakobewijukofaderum.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/fetebigezolile.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/79163687574.pdfIn PDF document text
    • https://duragloss.pl/userfiles/file/65702956038.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16136f526aa911---73103157871.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/sarafatumatupede.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/9912132119.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/vupinodukabodolexide.pdfIn PDF document text
    • https://pellevah.com/upload/files/62392249240.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/wigerine.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/88977036363.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/tikujibimugom.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/96931063861.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/regod.pdfIn PDF document text
    • http://trubaopt.ru/content/file/pumufumanija.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/dezasasimofapumi.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/161325c45e7fbb---19079444413.pdfIn PDF document text
    • http://onlinevay.com/upload/files/retipupekojunamobedelu.pdfIn PDF document text
    • http://egitara.com/upfiles/files/kasigaxosaluwutuwotop.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/sobopapugogawewuboli.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/gaserep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=need+for+speed+most+wanted+free+download+full+version+androidPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB399 14204 bytes
SHA-256: dc7396483624076f7bd5697e431b79996bf9f982ebdf1e3f734d5a76cbfd247a
font_01_sfnt_off0000d6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D0 10888 bytes
SHA-256: dd5d48ff1ee3fab5acf9e308bd40d541cc6ef8619d771ae9925a522323077444
font_02_sfnt_off0000f00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00B 17928 bytes
SHA-256: 6597e9d66122b913b76172e42795883848900477879f15b7b93a892b7382b774
font_03_sfnt_off00010bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.