Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c3faa01874434c…

MALICIOUS

PDF

86.6 KB Created: 2021-07-29 18:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 61e594ac7421e659ae677c33b4e15073 SHA-1: 57ae13750bbd94e8a56125b1e78bc53ae6016170 SHA-256: 49c3faa01874434c896772820bd79ce338416466e21764de3532b73688c5c992
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of multiple external URIs and link farm indicators suggests an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://brandnewgoods.net/userfiles/file/15900251502.pdf In PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/tofixafuxinilafesuso.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/uiqitn9dftnqp6a93hhvj1g424/kosubojaliza.pdfIn PDF document text
    • https://hinaweb.com/upload/file/novawaw.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/48646321067.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e47bea7b2e---sujutaded.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/2504100828.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/34bg1sos6d0pv7b0udltjkgl7q/10657514814.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/28123025316.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/18360076241.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210601224743.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/88593982742.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/ft3dnejjdrsvbknnbuc288a7d4/26212997994.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/8e9c2eb7e90df85ed6a2f8819e65fea5/54557669687.pdfIn PDF document text
    • https://carlojans.com/cms/file/zuxipiwetefepipinibujabi.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210715_210548.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/82919214381.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/xebafigumotofubilavabo.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/d329c8a0ab689a34406d5db9da2f5de5/2792639084.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/29913060966.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bc531cbf861---zomekozotikuruwotenakema.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/903ad09d598d024753853c5b81549cf4/57908213379.pdfIn PDF document text
    • https://vongtaytramhuong.vn/upload/files/52888366502.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=justice+in+to+kill+a+mockingbird+quotesPDF 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_off0000efc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 16252 bytes
SHA-256: d0efb234e0146480d05c02ab4b959ac37d673b5c582820fd523f26ebfe991a65
font_01_sfnt_off00011956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11956 11184 bytes
SHA-256: 752b2a5780e8386453383a8d3c54d1b6e0f53e3d40b18825ea70068df64e30f2
font_02_sfnt_off00013303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13303 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1