Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0df2c9bf9c185a…

MALICIOUS

PDF

113.5 KB Created: 2021-06-28 23:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 007b38bb923b6ded44324bbee58fd568 SHA-1: 29854f6e0b4ceee23d3ed685fed48b8a10de4ff9 SHA-256: cc0df2c9bf9c185a0cb416cf8c8eeac061cd04a856d92ab0fac7d9a367097711
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute further malware. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kengosushionlineorder.com/uploads/files/lileparixibirol.pdf
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077649b9e093---ruleguxina.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c22a96e87---nofaginegutoponilivabemap.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a16e65b5300---60478292074.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fee87ba482---nowetudes.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/cf93e578889f75bed1a300fceee1076b/jirekamuvuvonuwalikuzonow.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c581e45dce7---76006709215.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/kdihn59cecpuqtbm1kro3kn0e6/madiropumoxojafedupenexam.pdf
    • http://btc-ltd.com/upload/file/gawegomavufofeza.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf0c782f7e9---jinarofofixisej.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d93eab8226---44104542194.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/3r1mn6d96fjh71c97nofhut4kj/93808008331.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c18c5d8c55d---dutupuzikikekilujujo.pdf
    • https://brtim.com/uploads/wysiwyg/files/6944907322.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16097c1083741e---tezuwijapedasifewoz.pdf
    • https://permargi.com/files/galeria/files/mopituzuvokuxovuzili.pdf
    • http://allycatering.com/userfiles/vonipafubepasux.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/e64d8a5e5a89ffb147ed01639382979b/37968220594.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/6e84abe3a85cddba7dddd94b944cae72/vewizedokifewesajitekep.pdf
    • https://vandolderskb.com/images/usr/58134513459.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/c4fe95cfddc4a5baeae41018fad3648e/dinare.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/f1e7bdea8a431fb9826ea94b24fdaabd/75991597968.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=electrical+machines+lab+manual+for+anna+university
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/3430bc4822e6da4db40622b83dc1b8a2/getupaxupavedenekurowulin.pdf
    • 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_off0001532a.bin
e73e2a32dca9b2a673cf448c73ea8d1a63fe703540841ccaf9da4021775ff15e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1532A 11004 bytes
font_01_sfnt_off00016c92.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16C92 16792 bytes
font_02_sfnt_off000184a4.bin
ff0489f7a1ddfc86c7576cd98a07841d72bc45babb1e6a2d6fb8f15c01306592
pdf-font-stream PDF embedded font (sfnt) at offset 0x184A4 19656 bytes