Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc1cdbed3795420…

MALICIOUS

PDF

84.2 KB Created: 2021-08-19 19:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d42f6ab5c0b79042cbe79835b41c3c28 SHA-1: b946165082404c827be8f94b26eb270235e5bf59 SHA-256: afc1cdbed3795420d095f88c060549a0ca8fcaa386dff997df99a33822996331
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. Heuristics suggest this is a phishing or malware distribution attempt, with ClamAV specifically identifying it as a Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://smidgel.ru/uplcv?utm_term=we+wish+you+a+merry+christmas+song+keyboard+notes PDF link annotation
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/5ddf5df677e14e2f802bb7b24f3d24cd/pusugopif.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/tanomosiditivafadodijeji.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160cb11d3a0a67---fetigalogibotad.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/mirabuzipexobalupupix.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a44f42d479---98003887586.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/88287112977.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/24f96c73qqpe6kerr9f5805ejv/14487228602.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/47503341987.pdfIn PDF document text
    • https://promise-land.com/upload/file/roxozezesulozepatexi.pdfIn PDF document text
    • http://townsendrogersfamilyreunion.com/clients/9/91/912616e09393d205379ff76530a10a1f/File/jusezigovafan.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/8cef2c4aa183fe8c01729ed0973878ed/delolelegotizoduku.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/nirokabuwunevuxedok.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ee036532057---kavifedopel.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/ee5260b1c065090af928cfde80ae32bb/zimepimizoliw.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/finamulebasevetanilaro.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/redewigibumugumilazo.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a72e593d42---42317633852.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd031046cd5---vuwexep.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/58268499885.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/34e7c9c8a31ab4df2854e4aa6ac3615e/voruko.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46936166d8---lewidusadiminunor.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/6lnmij8nn1npuodfekj1jtbvdr/pigebi.pdfIn PDF document text
    • http://gphs84.com/clients/866382/File/81805789282.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cc2265e6d---54363953546.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_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0E 11296 bytes
SHA-256: bd46e19c42b3681aa091737b0e2d48355db10613969f621fbf6a05ea5bb8a8d8
font_02_sfnt_off00011753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11753 16628 bytes
SHA-256: 50ef6d16839197eacc4f25eb9497dbaa270edec2664b1cf50ba8277e10023632

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