Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea29be61ef644294…

MALICIOUS

PDF

71.7 KB Created: 2021-10-06 00:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4a0064724ba5910c24c1446475710965 SHA-1: 56be08ac15ed13cf0698072f759be8af4aa1e4ec SHA-256: ea29be61ef64429405b3dcd32464ce8bf0450fcd28694da3ebf083f125deba56
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://batterseataxi.com/survey/userfiles/files/90553068687.pdf In PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/36099018343.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1615cc565c9889---texawekibawegirunimaxo.pdfIn PDF document text
    • https://projetovm.com/uploads/files/48470350918.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/likefokigodu.pdfIn PDF document text
    • https://szallas-karpatalja.hu/upload/keduvotiledixafit.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/refowikesifipab.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/pabosatabow.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/39150684087.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/61740655113.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/zarufuraginudofipar.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/jedan.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/93204822900.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/sadonixadi.pdfIn PDF document text
    • https://gangnampools.com/contents/files/vijaxutenu.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/5695445742.pdfIn PDF document text
    • https://laps.pl/userfiles/file/43682759435.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bc023e8bc---23616473775.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210905123805.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d34ca29227---laninet.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/wikarigikeguwaxogimumuku.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/68454124728.pdfIn PDF document text
    • https://orangerun.re/photo/files/barixes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=words+that+begin+with+c+to+describe+someonePDF 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_off0000b5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5CE 10992 bytes
SHA-256: b1ac2da04e05718f461ad1a9bd0a93bdee5677951b8fafe4bba09faf62a34bcd
font_01_sfnt_off0000cf03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF03 16480 bytes
SHA-256: 8fa14958b04368ef33bac21bf94f493e299f1f08f6f3da5bd702c9d327c40d85
font_02_sfnt_off0000f8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1