Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0945f0a22fad298…

MALICIOUS

PDF

90.2 KB Created: 2021-08-16 07:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2de1d662119161a5f68c68ad04543696 SHA-1: a6d64b76d6d4efd5853f044c203ca1aeb77622e7 SHA-256: b0945f0a22fad29839b2c5da8bc56e0e2fc0de574d563a5c78c1492c6f1aacc2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting. These links form a link farm, a common technique for distributing phishing lures or second-stage malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kleinschaden.expert/userfiles/file/kipol.pdf In PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b52c1946ea---zegenuvozajivoxawejogakol.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b00b434836b---vavozaxezepizoxifesifebu.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/4bdfabbqm3fkm409le1akj2sm0/36158243537.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d310837e53---pevimumogofosu.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/fep95218homc42ug7ph3rscv29/47019147714.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ed148db2bcf---50532650911.pdfIn PDF document text
    • http://phuongdonggolf.vn/app/webroot/uploads/files/pozatel.pdfIn PDF document text
    • https://paradigma.bg/uf/file/rudaturutawusume.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/29952595683.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/19301620909.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/33836435595.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/69799881990.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/fnh6tgfihue8ldjnhu5vlf22so/70397594817.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210804_061727.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/minowibuxitujipumaz.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/dixafabagefogevuk.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/pofefexaziguno.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/86020jlogthbj48k66elvtrv97/56283233596.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/nivorotewalejazu.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf368eb7bd---63293782687.pdfIn PDF document text
    • http://195exim.com/datas/files/gidabaxulalokawi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+old+is+malik+on+house+of+paynePDF 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_off0000e2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DC 17836 bytes
SHA-256: 79de5a5a9920f79dccdabf07deae9cc5a65ceea6ecf7e69fd24a8b5cf0ba9227
font_01_sfnt_off000111b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C1 16544 bytes
SHA-256: 66b7945b99a9c78025a9a0ace4161995b24b08b80ea391fd428eddc3553bac27
font_03_sfnt_off00014085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14085 10948 bytes
SHA-256: a094b82759a056c5da9d7d4bc2c1a0405895c7894d17e8fe1e8a33bfa00bcfff

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