Malicious PDF — malware analysis report

Static analysis result for SHA-256 7052ba576163604e…

MALICIOUS

PDF

76.7 KB Created: 2021-10-02 18:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 78840e62876757cd18707c80af41cd66 SHA-1: 99cc56092f9674d22907f8d0cb5790f183789aa2 SHA-256: 7052ba576163604ea4901a491b0723c5e17d3de7a5cb071fd7f96d968a951474
126 Risk Score

Malware Insights

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

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, with many pointing to unknown or potentially malicious domains, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating a link farm structure on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613264cb811be---72487380988.pdf In PDF document text
    • http://marienoellebermond.com/img/uploaded/file/45648426248.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/mabujukejesujetuxor.pdfIn PDF document text
    • https://rockeit.com/userfiles/file/bokezomosewowamaf.pdfIn PDF document text
    • http://ore-processing.ru/d/files/lirilanifonakotafipomez.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/61497365570.pdfIn PDF document text
    • http://mamtomchabahai.com/uploads/files/files/somivoditijisiferi.pdfIn PDF document text
    • http://rjt1.org/upload/files/85069169302.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/matimiwenonilidibedopu.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210906084339.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/fugajirupunuxiwutop.pdfIn PDF document text
    • http://artcvajk.friendship-match.com/upload/files/xanafixawibufefiwapixanel.pdfIn PDF document text
    • https://amt-alarmy.pl/userfiles/file/moxewovekuzubukabudepi.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/62897334352.pdfIn PDF document text
    • https://molecult.metallo-tests.ch/sites/web/upload/files/68537972632.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/mepodaronapelizo.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/dowixifowuwasozudojogug.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/15b31f88c318a574b8880cad797a78b1/25515641041.pdfIn PDF document text
    • http://stroi-sistema.ru/img/pogoruvareko.pdfIn PDF document text
    • https://tepihtrava.rs/files/panapisekikeju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=blessed+is+she+that+believethPDF 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_off0000bdef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEF 10280 bytes
SHA-256: 1586e3d5a42d0201ac9bceacb9c4aa84cfb3782802040ce9caf6c27c3cd1790b
font_01_sfnt_off0000d53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4D 22048 bytes
SHA-256: 11ed1b9556a024b549bfea3f0ee0ceffda5aff884152f7b3a0e22ebafd389000

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