Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a004be87abc1c5…

MALICIOUS

PDF

78.6 KB Created: 2021-09-17 13:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: af235a6c8de93d9877d71448fe3c5408 SHA-1: fffd9bf5be08708ca5d4489c8abd7f6be51c173e SHA-256: 26a004be87abc1c5bb32aa0d88a71c320534d57249a6537a8694e6663fe52a9b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to domains that appear to be part of a link farm, with some hosted on compromised CMS uploads. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading further content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.
  • 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://huntic.ru/uplcv?utm_term=pokemon+mega+fire+red+moemon PDF link annotation
    • http://studiogeologicotrilobite.com/userfiles/files/xoputejapakukakimajoruxu.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/sogojabipegibinebuf.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/nofalaxopigigelanixidi.pdfIn PDF document text
    • https://rajakeempat.com/contents/files/42986593467.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/tigamusowono.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16142862157a7f---29869951626.pdfIn PDF document text
    • https://danfort.lv/userfiles/file/84907972667.pdfIn PDF document text
    • https://warungmimpishio2.com/contents/files/61012848836.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/kijuvotiw.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/66026405409.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/xalixoz.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/sinudowex.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137544a878bf---katozamivepuwukivugi.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/3010544769.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/visojifenag.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/7h025sanpui4sgp2nj200r2bg2/33936409711.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/13896160914.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/32884844294.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/37720794820.pdfIn PDF document text
    • http://citranco.com/users/files/wibimagapexapa.pdfIn PDF document text
    • https://keluargamimpi.com/contents/files/nafudalisemokoduzakosik.pdfIn PDF document text
    • https://lordoptika.hu/files/files/82246229325.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/46412334303.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/84a6ddf457f175cdec53240cedf673f8/34258394505.pdfIn PDF document text
    • http://darec.sk/files/files/41307581585.pdfIn PDF document text
    • http://nasfthr.com/userfiles/file/sexesenubamozugijilat.pdfIn PDF document text
    • 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_off0000cd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56C 18148 bytes
SHA-256: e4288e7b5c25fff5d57978d92ddf8a95466ff172e882cc492be06910ee82f627
font_02_sfnt_off000114d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D3 10480 bytes
SHA-256: 0c5252b52613f75f389aab7a25af0c5e277c79697df466402415938de7439e7b

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