Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d71dbbbdf3f459…

MALICIOUS

PDF

89.0 KB Created: 2021-05-24 02:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d7174f447bdb8d27acb35abbdc46be3 SHA-1: 5b264d0260790485b8ce2f9594788d57ec092b06 SHA-256: 60d71dbbbdf3f459ae98750d0075fa88dfd3835b1515ed77e8d8155f559407a1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, and is flagged by ML classifiers and ClamAV as malicious. The embedded URLs suggest a phishing or malware distribution campaign, likely initiated via spearphishing attachment. The document body, though heavily obfuscated, contains references to 'character map uwp for mac' and authoring information, indicating a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/strik?utm_term=character+map+uwp+for+mac
    • https://lojexidipiwakif.weebly.com/uploads/1/3/4/0/134041559/cc47952710.pdf
    • https://xusemiwo.weebly.com/uploads/1/3/4/8/134899199/fajarofulek_dulizufe.pdf
    • https://jokikisiva.weebly.com/uploads/1/3/0/8/130873994/terupa_lagowokof.pdf
    • https://cdn-cms.f-static.net/uploads/4384035/normal_600f1144d007c.pdf
    • https://miwimuwal.weebly.com/uploads/1/3/0/7/130775744/vufedefi.pdf
    • https://cdn-cms.f-static.net/uploads/4384645/normal_60566d18890de.pdf
    • https://zibinileder.weebly.com/uploads/1/3/4/7/134748255/87a27590.pdf
    • https://cdn-cms.f-static.net/uploads/4387813/normal_606de099a47e2.pdf
    • https://fiwobezamarevev.weebly.com/uploads/1/3/2/7/132740324/lurewuravoladibalosi.pdf
    • https://cdn-cms.f-static.net/uploads/4505326/normal_601aac947d716.pdf
    • https://bemozepe.weebly.com/uploads/1/3/0/7/130739793/kitasawilel-zomupe-tibujipodolitan-duzusawa.pdf
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/Copyright
    • http://www.typoland.com/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gonasidupij/dezolidoxuzeva.pdf
    • https://uploads.strikinglycdn.com/files/e94a495b-a70f-4575-a297-fb9e8424c1b8/wobimonilidudesovaz.pdf
    • https://s3.amazonaws.com/gelawiweza/1562935048.pdf
    • https://s3.amazonaws.com/wemupajese/pefekalatelogewimofi.pdf
    • https://uploads.strikinglycdn.com/files/662b946e-5254-43b4-9f74-86555332b390/vagarubuwaroberetem.pdf
    • https://uploads.strikinglycdn.com/files/24e415c5-60c7-4bc2-b829-2129fd0bba04/rirozagavofalajorepab.pdf
    • https://s3.amazonaws.com/jonora/how_to_turn_on_pilot_light_on_williams_wall_heater.pdf
    • https://s3.amazonaws.com/xesigeze/glencoe_algebra_1_workbook_teacher_edition.pdf
    • https://s3.amazonaws.com/tesodagiwor/54502955362.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e633.bin
9f07a400e75c177e496f395344003d4a7545e118b36bf59d530d47f9bb3550f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE633 6168 bytes
font_01_sfnt_off0000f5a1.bin
4b49b5f6bece70db7ec74646561081c3b544f0269218c51928ca17b2cf811e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A1 2960 bytes
font_02_sfnt_off0001002e.bin
7525c08fc43156e3ce5c40568f2f10994163c91aa705761ab5228fac13ec3ba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1002E 5040 bytes
font_03_sfnt_off0001113a.bin
9340f86ba5c1bb834f93a149c90f6cbbb4e251194c3a2e1778a24767fe330bbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1113A 12648 bytes
font_04_sfnt_off00013ba2.bin
339c04002e11438bc9581226d4f6d7209cefbf5b8658f4e40b019fd3ab015acf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA2 17244 bytes

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