Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a89d409195a033…

MALICIOUS

PDF

74.9 KB Created: 2021-09-07 01:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 09e84d1ce1bf2d6826224e9ef58a7a84 SHA-1: 756040916397acfc9284229bed1bcc8447515f7b SHA-256: d3a89d409195a033610e5e0e6a6e80c46ab71479484a166add94d33724db6380
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/933acc148a0e48caedf82633fd40560a/bokivexevad.pdf In PDF document text
    • http://arunimaflavours.com/userfiles/file/nitelagotunilidokosi.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609148d28304f---92094272140.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/fevasetukusob.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/44384419417.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/68230466219.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/1928566382.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/83052276800.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/d7ae458067487133622b931cfb1547e7/72635437457.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/f34e507d590939fbbbf93d8d6af3adcb/woxijaxikewotuzagafur.pdfIn PDF document text
    • https://www.padanguparduotuve.lt/ckfinder/userfiles/files/fufatifelogaxerepusaj.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/lupuneluzoridazup.pdfIn PDF document text
    • http://sentralperdana.com/file/42960346819.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1851ea96f736ec7365809ca3168a4e83/30780240393.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bab78e46f60---furobuzisog.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102b79d9c23d---37279348110.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/b5b4f9c1c7aa279cc74d604b7cc7bed3/54238894028.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/2tp35pon2f2vjrcu1rfetp4mv1/mitipowaleniwisusubekos.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/20910776659.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/naxal.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/xefeguzudiwukoselerax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=effects+of+planets+in+different+houses+in+vedic+astrology+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC28E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000daa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA5 11160 bytes
SHA-256: d91dd793f2c53acd93015862f0789736229ffb147b4b96103c0f189f7e7f4b5f
font_02_sfnt_off0000f483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF483 16056 bytes
SHA-256: 92a8cc9a3f560dec4c9f68c9a90a237e2e2fce9fd740d0f6046b6bf2d0c4a5c4

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