Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32dedbe546c55d4…

MALICIOUS

PDF

80.9 KB Created: 2021-09-03 07:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 747ffd3085031fefdd5a81e58a784c98 SHA-1: 588a29d9e9a3957d9fc7e8b5992f4ff7361d0699 SHA-256: a32dedbe546c55d4a6e9526a9ca4c2d0e82c16af65959828854b3f9e856891dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://catamma.ru/uplcv?utm_term=gita+press+bhagavad+gita+kannada+pdf PDF link annotation
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/7b5c9442476c399a27874ee28cae8636/84365898950.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/a2f2e26b9b25964fb8e05942e4b8e4a8/8266943640.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/pixevaxad.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/9583547278.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-4-30/20210430095932145297.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/xaxotametaliwapupizuxu.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/90602f6fcf5a1b6f81353cd782995d76/58348970607.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/wiwevojevotaku.pdfIn PDF document text
    • http://phamtrangia.com/upload/files/49199761701.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113e2df73b88---19029614923.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/goxupitomimefunudarinuwo.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc8b1c9518d---wisonebaza.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c951bbac327---52180202278.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/sijadat.pdfIn PDF document text
    • https://isosklo.cz/uploads/dofusibonudulizili.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/32568540347.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/44554731137.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/2bfteu3hs6ilnf2uhfk02rgps1/24829572421.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/gulotuzuvomor.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a93a04aee33---63275340760.pdfIn PDF document text
    • http://hasyo.net/files/file/47756499632.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a2018ca9c3---rediwuge.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/17466625729.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/musolar.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/62714601929.pdfIn PDF document text
    • 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_off0000d417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD417 18064 bytes
SHA-256: 28364dc5678b0384d6301ae092881f56349afab57a67de392e831b500b8c29d0
font_01_sfnt_off00010317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10317 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2E 10948 bytes
SHA-256: 2918f2e230bc3adce253018897cf8d332b958eb151c4f4ed1895ee8e0cb56959

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