Malicious PDF — malware analysis report

Static analysis result for SHA-256 29182e9392d3cb47…

MALICIOUS

PDF

84.7 KB Created: 2021-09-13 19:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 972f835cea4f7fd31eab027c66003772 SHA-1: f1c2db8749a58122e29fdee510ef1fb8812436ce SHA-256: 29182e9392d3cb4799945ea0e501fb5ff5218c307d54ed0f4f899abd6214ec4d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure victims. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded links are consistent with techniques used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://bankerz.in/qpic/files/zenatizu.pdf In PDF document text
    • http://teusz.pl/UserFiles/file/jogimuzaxuwokanarosujuta.pdfIn PDF document text
    • http://studioferrato.it/userfiles/files/fejomiwuj.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/ginalujuxemumagunevur.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e92b4a8ec6---zotefixezazopugibujiwef.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/13078806578.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/wuxakepufuzedegosabumeso.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/fisoxesowadogezo.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7226ca5b1---delapadafurefuvalebamuf.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/fetosofatubepet.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/botufibabidabugobupuli.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data/files/5854457247.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/46717205297.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/95083870384.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613185b1b2e84---javutikofuvorom.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/9542937680.pdfIn PDF document text
    • https://detectagsafety.com/ckfinder/userfiles/files/15537631257.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/22472087088.pdfIn PDF document text
    • http://luyenthidhcanhsat.com/Images_upload/files/34587913066.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/botudewigokodoxurav.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e7e1a19b5---kawitavadowumunozo.pdfIn PDF document text
    • http://honghuibio.com/d/files/zijasawisenifagenujotelat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=secret+codes+for+moshi+monstersPDF 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_off0000e4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EF 18748 bytes
SHA-256: f6279a4b69fad82c7dc5a7f4256c1e40cfb884d10c318e7830ccaa0f6515460d
font_01_sfnt_off0001150a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150A 10608 bytes
SHA-256: 5c2e068da10496653ac269edddcec9c1242278b082b2668663403c8486864afc
font_02_sfnt_off00012d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1