Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aeddd4e32ca96f1…

MALICIOUS

PDF

81.8 KB Created: 2021-07-19 05:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c3e219792080718c5d9403f8f1654f12 SHA-1: 07e998b9c6eb8f2895a9fb8ef310a99d350bf1c3 SHA-256: 6aeddd4e32ca96f178560dd3ea6ab92e53f44add714bc5ca73f44783323bcbc3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains numerous links, many pointing to potentially compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and link farm heuristics strongly suggest it's used as a lure to lead victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://moyamoya.center/images/hand_uploaded/files/fobixizukizaki.pdf In PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925f88908d2---90765345220.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/58706581127.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843248e8f08---29353416843.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/99659970421.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/jowupaxifalibifegonol.pdfIn PDF document text
    • http://rotarylaspalmas.orgdocumentos/file/53024686503.pdfIn PDF document text
    • https://davaocarrental.com/images/file/jijutikaniwo.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/kafizusila.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c5a080dac---72565576116.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/5af681fb585311bb92430a63f92c880e/94207570374.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/62935248580.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801077e30ff---xutawurisep.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ogi38p1jd8fgbargcq64pu62j3/40327487600.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074184a2af17---bopagiwufekulom.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/25396485905.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160d32743c80d8---91504464050.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070860b4555c---gekijumesisudetapiw.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/24410007616.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/2jtge1lu2pvviaqenrkma27jpk/raporalowanogutolurir.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/97232891417.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b66ecb5afae---27101421641.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/tarogijiluweserud.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/26282689031.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+make+iron+trapdoor+in+minecraftPDF 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_off0000dab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 17720 bytes
SHA-256: 6f8b0435e4615b469ccb8925461f7b8d728c27ee247bcaccb3621b0def758661
font_01_sfnt_off000108fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12114 10736 bytes
SHA-256: 390ed03f03165e863bed0b227baa939a871fd477aa2edf07cbfeeaa1eeabaaf4

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