Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c5b32679a0890f…

MALICIOUS

PDF

83.1 KB Created: 2021-09-16 21:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 164e7f0e90fa3870fa6e0657cfc3dc3c SHA-1: 8e513f4e1dc7480088f7889639da13dcbf8ad1e4 SHA-256: b7c5b32679a0890f6b75acbce03f07cf4c59b66321f81e337fcd57a800487695
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to trick users into visiting these sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://ketchas.ru/uplcv?utm_term=most+apps+crashing+android PDF link annotation
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1612eec83789f5---viwunotul.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/49115060673.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/fexunumon.pdfIn PDF document text
    • http://materialdeestudo.top/userfiles/files/vilafamavupokezarugul.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/46137282162.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/64825235551.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/79294471959.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/68905077519.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16130f6f1b2869---42123950985.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/zolirazim.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/zutada.pdfIn PDF document text
    • https://edinburghpools.com/contents/files/sewoluxofijaravazafade.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161317809a7679---luket.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/75133024545.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd01d95bdf---98504384934.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/malasugekevovumeza.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210910082659.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210901205342.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/bopisokokedovuwuferufex.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/60988998199.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/puzokiwivezogow.pdfIn PDF document text
    • http://rnralpha.cz/res/file/dawafeturamod.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b21e85ac37---38049394656.pdfIn PDF document text
    • http://bilcafe.it/userfiles/file/70447305035.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/59380810707.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_off0000e009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE009 10608 bytes
SHA-256: 5feddf2e94a991d0a213f98817a546a2c3dc77e5b0cacc451c100b4176eeeda1
font_01_sfnt_off0000f80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80A 17704 bytes
SHA-256: 073d2c503ad3e9e5e65e55db3f4aadc96d8d50a92f437c1d5d0a9aec861b37d9
font_02_sfnt_off00012649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12649 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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