Malicious PDF — malware analysis report

Static analysis result for SHA-256 22784018c3792ea5…

MALICIOUS

PDF

103.4 KB Created: 2021-09-13 18:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f31bb260224b0899933bed062e77d759 SHA-1: 00500eb7da39c58d0016dbd95224dafb5ce23dbd SHA-256: 22784018c3792ea58555cdf46aac3028bd77b4485ece179804ab894108846077
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malicious download attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=gta+san+andreas+drag+bike
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613abf7aa60b6---fajipexekaxoxadaxamuxobo.pdf
    • https://m-isc.com/userfiles/file/94082836800.pdf
    • http://kdbelektrotechniek.nl/uploads/file/86588566025.pdf
    • http://yachtandgulet.com/userfiles/file/zitiketefufawulegowiwim.pdf
    • http://edilgroupdigiovanni.it/userfiles/files/19258681408.pdf
    • http://www.perchegouet.com/ckfinder/userfiles/files/60777218749.pdf
    • http://sententtech.com/file_media/file_image/file/78899262750.pdf
    • http://studiotecnicofrisoli.com/userfiles/files/luxavonar.pdf
    • https://cordovajewelry.com/images/file/4749598144.pdf
    • https://yunglin.com/uploadpic/files/33226122166.pdf
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/77400928810.pdf
    • http://kool-house.com/upload/editor/file/rijabuxati.pdf
    • http://nawooelcs.com/upload/userfiles/2021/09/files/210905165715.pdf
    • http://guerrazzi.info/userfiles/files/kigozanivov.pdf
    • https://et-auditing.com/userfiles/files/44058438261.pdf
    • https://agentcctv.com/userfiles/file/90744869219.pdf
    • https://itandem.net/ckfinder/userfiles/files/tivavaxifage.pdf
    • https://dermatologie-chamonix.com/userfiles/file/rititopofosowaxumuki.pdf
    • https://jpjplumbingandheating.com/FCKeditor/file/tevefofunobifubigowizix.pdf
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14473374085.pdf
    • http://wmc21.com/ckupload/files/81921471399.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012973.bin
98c2d25379faff586006e34089eb953e65e4492fae982d48e33926cf1299ab05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12973 20828 bytes
font_01_sfnt_off00015fd4.bin
1eac0cb06652aff61fed6154f1f7984b07fb6aa20f5b35e655a5925861eadda4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FD4 10528 bytes
font_02_sfnt_off000177c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x177C2 16792 bytes

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