Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e822c4ceda38255…

MALICIOUS

PDF

81.8 KB Created: 2021-05-12 17:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9439085df00ab0cbe1a1b9264489c9dd SHA-1: 26d6a5be0bc192d82064810769e690cc0f078b72 SHA-256: 0e822c4ceda382556c776a40ab5eb879caa48a9ca770f43236afb68a7539165c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'computer programming books in urdu pdf', directing users to a URL that likely hosts a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/strik?utm_term=computer+programming+books+in+urdu+pdf
    • https://cdn-cms.f-static.net/uploads/4457272/normal_602aae1f9bbd3.pdf
    • http://shtangelkipokupkiitd.online/jesenokojutejowuzukecj582.pdf
    • https://rowagikej.weebly.com/uploads/1/3/4/6/134678960/d6c3440468.pdf
    • https://static.s123-cdn-static.com/uploads/4410415/normal_5ff4f4c464b59.pdf
    • https://fedonofawok.weebly.com/uploads/1/3/4/8/134881994/tevijokofibiwarer.pdf
    • https://banafazag.weebly.com/uploads/1/3/4/3/134325205/didevufuw.pdf
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5fecb191d74e0.pdf
    • https://basopuseg.weebly.com/uploads/1/3/4/7/134703880/6e0d69b73bb54f1.pdf
    • https://static.s123-cdn-static.com/uploads/4381980/normal_5fe38ed342c35.pdf
    • https://sedeberelaniku.weebly.com/uploads/1/3/6/0/136030724/pobemaza-moranokewodetik-xakuxukotakof-vofonunofov.pdf
    • https://cdn-cms.f-static.net/uploads/4447669/normal_603ed4f704371.pdf
    • http://rujawobezixevib.iblogger.org/crabbing_report_md_2019.pdf
    • http://nout-sale.site/1659714354pwlkc.pdf
    • http://getallcreditscores.info/votateu17vt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kesobiw.rf.gd/cherry_bomb_song_free.pdf
    • http://labazorev.rf.gd/spatial_transformer_networks_tensorflow.pdf
    • https://s3.amazonaws.com/fikuvine/which_book_is_best_for_ies_mechanical_exam.pdf
    • https://uploads.strikinglycdn.com/files/d3af4f8b-cc45-4f6d-9f8e-23853efddbc8/dotuzepudejamodunab.pdf
    • https://uploads.strikinglycdn.com/files/d677b050-d915-425e-8dbb-6dea3fe4b3f7/how_long_to_gre_scores_take_to_send.pdf
    • https://uploads.strikinglycdn.com/files/05581d9e-18dc-4e50-9d8d-8786641f193d/6872737265.pdf
    • https://s3.amazonaws.com/tugumeb/how_do_you_reset_the_ecm_on_a_cadillac_cts.pdf
    • https://uploads.strikinglycdn.com/files/8b3539f7-4ae4-4084-a21f-47cce36faa1f/nizazoniguruwu.pdf
    • https://uploads.strikinglycdn.com/files/70611eed-0832-453b-88b5-a55fcba3d2c2/girl_from_ipanema_song.pdf
    • https://s3.amazonaws.com/fikuvine/40534218995.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffb2.bin
3a47c0035db6856624c66b1d811c8d4e35d54dcba8b7b33fd7be5e4eaf5b8366		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB2 5436 bytes
font_01_sfnt_off00011214.bin
91f40dfdbef13b4d048ac21ca05f518c66b7470c1378bd298b0c27fd75ca80ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11214 11552 bytes

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