Malicious PDF — malware analysis report

Static analysis result for SHA-256 178454516ec8ea33…

MALICIOUS

PDF

93.3 KB Created: 2021-09-20 23:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f82d987723932612ae899de4964b52fb SHA-1: 699b76dccd85d96695c24469e082033b8aeaa616 SHA-256: 178454516ec8ea33764dbe0c79120906baaaa07b2c421439ba48dfec5e559778
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's content is designed to trick users into believing there are changes to payment instructions, a common tactic in business email compromise attacks. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136062165ecb---nopepebu.pdf In PDF document text
    • http://runhouchem.com/upload/files/xirujenanapogafozolulem.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/91696962005.pdfIn PDF document text
    • http://infoegrafica.com/userfiles/files/linamewiwevuzezipewu.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16139875e8d57a---91172673536.pdfIn PDF document text
    • https://webmenuplus.com/images/file/60029675670.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20210907_064635.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/jejosora.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/zudeb.pdfIn PDF document text
    • https://highrise.pl/file/panunemebisogodusewuji.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/xiniweg.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/fowof.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/milaf.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/161323e21cb28d---samomenu.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/vuzujimekoxitimesoguxude.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/18434975270.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/gujukipevubarare.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/paxupinezuzexivi.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f49e129de8---letebiliba.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-11/20210911195514896985.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/68102062943.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/55637287966.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=sprint+sim+unlock+apkPDF 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_off00010481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10481 19704 bytes
SHA-256: 09c578206c428b2ff5addbc2fbb5605e9ff057555fae8152cbfa45b3e470bf88
font_01_sfnt_off0001375c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F73 10672 bytes
SHA-256: ff103caa2231fb39ebf255cc22cba943af003c4ccae66331bc0f090fbab9d5e7

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