Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff5b2336d6901b52…

MALICIOUS

PDF

76.9 KB Created: 2021-05-19 14:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bf45ee7e1272f5173418ca5489712f44 SHA-1: 7555c82bdf9a06a87770a6c8ef41ff55ea7acab2 SHA-256: ff5b2336d6901b5223656b40e7ac1fbee8b30a0b2e3d5ace07386639823b3bb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, including a link farm to 30 other PDFs, and a primary URL that appears to be part of a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains text related to the embedded URLs, suggesting an attempt to disguise malicious content as legitimate search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/strik?utm_term=how+many+floors+in+the+sears+tower PDF link annotation
    • https://rapelolizoxofi.weebly.com/uploads/1/3/1/3/131381924/934686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490364/normal_605f804b4310c.pdfIn PDF document text
    • https://zudobusida.weebly.com/uploads/1/3/5/3/135330479/8793709.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530578/normal_5fff33d9f3820.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6621eb44-e9e9-470b-9ae8-c744a100ba33/11328763538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/367b144f-3797-4877-bcdd-ad609644e65b/which_bible_translation_is_most_reliable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c605fc2-edf1-4590-92bc-0b856e4e6e64/bexutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6291523c-2e53-470d-8112-c17e8bd9069c/65403131940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84979840-938d-49b0-838c-e58da3c03643/vasapurijumabaxubixub.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/my_scooter_wont_start_when_hot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5e10ff-a90e-45b2-a9a4-1754de313f2d/37350587914.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/driver_bluetooth_win_10_hp.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/torinotikegixasinu.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/zapatillas_converse_plataforma_piel.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/nasenizigivutufodorib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f61677b9-d6c2-4ffa-a76e-496b88532022/jegovejirufiviripapukiw.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/carrom_board_game_karna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e33835f9-ae0a-4862-80ea-27d87d369290/how_to_make_a_mob_grinder_survival.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef05fd42-894d-4147-8431-9fa8620c859d/14296278465.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF118 5160 bytes
SHA-256: 6926d52f4e7044cbc9e5ce99f99dc7292f5a6209766527ddaf4bc9174109a408
font_01_sfnt_off0001028d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028D 10532 bytes
SHA-256: 319ed519a6979138106b124372f1c757f97b273cc60776ee756332f936db89b1

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