Malicious PDF — malware analysis report

Static analysis result for SHA-256 0122ff52ad5fb0db…

MALICIOUS

PDF

70.1 KB Created: 2021-09-26 04:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b61e67029b796bf395811241c177bd53 SHA-1: e11b724516fcd2efb1f081aeac0b4514d8cdae2a SHA-256: 0122ff52ad5fb0dbb4c9fd255d2a0b840ac6de00b3f8635cb3fc0374c0791449
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing lure or a downloader for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/gt60m61abrak1tuc84se4gcl4m/wuzoven.pdf
    • http://dges.in/userfiles/file/92831756164.pdf
    • https://defi128.phpascal.com/userfiles/files/58543222000.pdf
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/rirapememawebesikol.pdf
    • https://ist-lb1.istanajp.com/contents/files/98646520583.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161430428b25d8---34723905310.pdf
    • https://ustunbilgisayar.com/userfiles/files/82747439483.pdf
    • https://suavitinhtannha.net/upload/files/gusaliguruzet.pdf
    • http://jandebruijn.com/uploadimages/files/47398644150.pdf
    • http://chanakyaaerospacedefence.com/userfiles/file/rebopetafuzovuduvize.pdf
    • http://gpe-el.pro/ckfinder/userfiles/files/97637661813.pdf
    • https://miltonmattox.com/userfiles/file/93435400306.pdf
    • https://bawauang.com/contents/files/winemoxiridopagim.pdf
    • http://cravaluos.com/ckfinder/userfiles/files/9388696750.pdf
    • http://plenaseguroseprevidencia.com/fotosempresa/files/dizazuzikogorideg.pdf
    • http://saothienemb.com/uploads/images/files/xifuzonutudaxadazebopefe.pdf
    • https://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/92766680496.pdf
    • http://kbidc.kr/upload/editor/file/1632160991.pdf
    • https://colakcivi.com/userfiles/file/55503680573.pdf
    • https://securincasso-online.nl/ckfinder/userfiles/files/fadatasovivujari.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/c27381a784e7ca0428afaa44f3f04829/xepogalazuxalupaxuj.pdf
    • http://hanasushi6.com/uploads/files/44468880549.pdf
    • https://www.allduniv.ac.in/ckfinder/userfiles/files/jitavizikejupikizopifi.pdf
    • http://phamtrangia.site/upload/files/11777738767.pdf
    • http://mexxeopaint.com/upload/files/tivokogolamuzujixefe.pdf
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36803153096.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=mafia+wars+zynga+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EA 16792 bytes
font_01_sfnt_off0000c9fc.bin
2a3475652097bbef192b7aa963cf60b8fe61266559d710605dbe5e44f58b575f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FC 15460 bytes
font_02_sfnt_off0000f151.bin
1afac5d02e92da20a1614f8bc094cdf0f931b26a44a8cdf3d0cb99ae3fdc99a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF151 10504 bytes