Malicious PDF — malware analysis report

Static analysis result for SHA-256 77bdba1279aa177d…

MALICIOUS

PDF

87.5 KB Created: 2021-06-25 20:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: eba1ee6d31fc4124123e519808441b02 SHA-1: 03ce7aa3e8f8c51e04ca315c4ff6b756376b2096 SHA-256: 77bdba1279aa177d295e70b42382d3856e2520b6e1bddb4f1062187f81a6cbc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting it's designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly supports its role as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://ketchas.ru/uplcv?utm_term=be+more+chill+the+musical PDF link annotation
    • https://amatnieks.lv/pictures/image/87401603932.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/67737697840.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c30ea5d6867---25624346853.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160841bfd6aef1---30646517709.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/dixabawezabemesejajavixu.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/57325355373.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/10427093964.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cc93eac68---sonenekirono.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/f5ca7a9df48ff7d6c750b3fe2a0cfd28/97536584333.pdfIn PDF document text
    • http://adveotec.com/img/file/12088017622.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a825ba6e58a3760a03055d1356dba607/gunuwarobetobaje.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/0482637a865b265d1b01f412006c7f81/xugebo.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/fapukudekovefanumelabe.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/fdb035f711a052e101860476f43ea8e8/mikimaregoba.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160cede6d0df95---wujatogimoxanorejazali.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e020168582---55553989107.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210621233713.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/3952652327.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fa57a55fe---20349919028.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b19680e5992---98538249860.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/701rimvp6oe02m6sl44707osfc/tozawagegipugap.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

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_off0000f280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF280 17140 bytes
SHA-256: 8abb692ce06ceaa6e8da95dcde2cb84c9e96ecd070b40a70909688cda4efe95c
font_01_sfnt_off00011f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F27 10544 bytes
SHA-256: a79589cb79667ffb5f5ee4dab3f3305f6596b3903ddedf2da6c69fd6795234f4
font_02_sfnt_off00013737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13737 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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