Malicious PDF — malware analysis report

Static analysis result for SHA-256 057bc74e8f71126a…

MALICIOUS

PDF

85.3 KB Created: 2021-09-23 22:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9eaef16329ea841972a65264ff046053 SHA-1: 4cc14c8e536aea5d37d5ad810857052a100cb6dd SHA-256: 057bc74e8f71126a55496bcd6a0a7adffecfc58ed3d3bcc6446f67d3f03b6b1f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites. The heuristics indicate a link farm designed to redirect users, likely for phishing or malware distribution. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common vector for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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 https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613c38d67325f---23067984433.pdf In PDF document text
    • http://contactfm.be/userfiles/files/94988345379.pdfIn PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/vodemutetigo.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/77366300506.pdfIn PDF document text
    • https://skywaytravelandholidays.com/ckfinder/userfiles/files/56316857412.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec6c57e476---wisosamuwotukoxobe.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/2710804784.pdfIn PDF document text
    • http://jianianhuayule.a9188.com/upload_files/art_files/files/20210913_120057.pdfIn PDF document text
    • http://charontrade.hu/data/file/10902686195.pdfIn PDF document text
    • https://efnnma.org/files/file/41501580925.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/86916285114.pdfIn PDF document text
    • http://hawaii-resort.info/images/blog/file/78006049959.pdfIn PDF document text
    • http://cee1968.com/ckfinder/userfiles/files/najibogoleravaparetut.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/68962202021.pdfIn PDF document text
    • https://camphacement.vn/upload/files/vibadojazobure.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/68882757014.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1632144252130223161.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/vevufefewusuluwajole.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137170213297---80396312859.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/26719745151.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/79635202462.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/18004017171.pdfIn PDF document text
    • https://cmf8.ir/data/file/jomutisodetuboxuwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=free+roam+games+for+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE6 10532 bytes
SHA-256: 8c6b001fbab73c02303c74c6b12f94c491ea55d7bbae9eee8353461d30136d51
font_01_sfnt_off00010496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10496 16780 bytes
SHA-256: d96525134260f71a0eda2be617d141331f3b266b6959a86abebc223436992900
font_02_sfnt_off00012fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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