Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac0e5862c92e242…

MALICIOUS

PDF

85.4 KB Created: 2021-09-13 08:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8aa316992660aaf5f59ad7feeb62e0ee SHA-1: 44ab99de41ba8d2af7fba0837924bc093ecbe3db SHA-256: 1ac0e5862c92e2426c53e3e270f5d62e44d6df7f97be22c794f53ef14ab82fe0
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many of which point to disposable hosting or compromised sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of JavaScript suggests an attempt to exploit vulnerabilities or redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://vienhung.com/webroot/img/files/xivifazubuzamezawaz.pdf In PDF document text
    • https://dobre-akce.cz/media/files/file/3413554350.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/zenalusikadimobof.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/lepujisina.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/pilobuwesegav.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/zoxefe.pdfIn PDF document text
    • https://support-trevianum.nl/userfiles/files/kopejivobu.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/43a231404fdd598bb1627037dd4d33f4/89007061081.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/xedukusubapulim.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/a8cda80ad74c54ae13f327f0a0e84c9f/65493258394.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/wekuzuson.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/varizixotulubipoka.pdfIn PDF document text
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/borafupujeludeposozezega.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/fm49om3f73j248b4otps8kuah4/32187607994.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/8986603612.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/42894979766.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/58465600536.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/bozijofupudawib.pdfIn PDF document text
    • http://aid-calais.com/userfiles/file/93532098810.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/varip.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/pagupudako.pdfIn PDF document text
    • https://crmsaas.dswip.com/ci/userfiles/files/17181136784.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/xozewonapilusofafuvido.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/luxukipaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=download+truecaller+premiumPDF 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_off0000ea3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3C 17616 bytes
SHA-256: d110000ea7c0532204a6395f5d24f38b2063d0c80f3f2c09819d59b0d3a5f7df
font_01_sfnt_off000117db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DB 10692 bytes
SHA-256: e6935e5101dc4dd26ecc5736ee6f0cdbce52f275481150db3b3f70281a2a347e
font_02_sfnt_off0001305e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1305E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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