Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e57271b1ef6e254…

MALICIOUS

PDF

121.8 KB Created: 2021-04-15 15:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfa89df2f51ea9f466cf37921a3cb948 SHA-1: d230bd8b4c17f19dba5fe6b185827158c2f545d8 SHA-256: 0e57271b1ef6e25443b609783ff1064b24a9ad1b9805be94bad3c32fd3c00003
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with one primary malicious URL being https://nipisod.ru/strik. ClamAV also detected the file as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the overall structure suggest an attempt to direct users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/strik?utm_term=india+and+the+journey+to+the+east
    • https://cdn.sqhk.co/devisofage/eridvia/followers_on_instagram_hashtags.pdf
    • https://cdn.sqhk.co/sotatixorawi/ii0ijdF/molecules_of_life_1_usatestprep_answers.pdf
    • https://cdn.sqhk.co/xunalafugapa/viigjig/forgotten_memories_ps4.pdf
    • https://cdn.sqhk.co/kevapaboxer/xjjjcjb/5860630560.pdf
    • http://wuzivigufeg.22web.org/32591495997.pdf
    • https://cdn.sqhk.co/pamavunawi/AjghWmo/xasozojijogujukazalan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dd6f0c70-611b-430f-b219-ee0593fd0e1f.filesusr.com/ugd/d60051_109cedca69ab4f9b8d4a3aa06fe8f1fa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9f483f9e-68df-4dd3-9e6e-f5f1aa327cca/kufekutigejej.pdf
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_a31f9899ce244f348cc020d2773a57ea.pdf?index=true
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_1df9712b85f145e0a77f1b3421e5c5dd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/65961d78-6c7a-4446-8a56-3f0d9fae76c9/45259237088.pdf
    • http://pumejusatojajeg.rf.gd/36911384051.pdf
    • https://a24bc4ef-4ee2-4fae-af0c-c9fea810b245.filesusr.com/ugd/67d96c_e7e06692b5ae4ea6af5ffd48c9cf16bd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/74fbe3ec-f78d-4ab7-b1b0-11cb226fdaa4/peximuxeloxar.pdf
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_a7635ca27f294776851eabe0302372ef.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0b275ccb-18ba-41c5-b1c9-c0d95bba3786/can_i_use_my_sony_cybershot_as_a_webcam.pdf
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_b90929c5d72e4f94943b437ac8ed07ac.pdf?index=true
    • https://59548cc9-d6a6-4b2e-bd73-2bfb7290c7b5.filesusr.com/ugd/3fd21f_271fd9d080fa4b41a6ad5b7d8058b61a.pdf?index=true
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_f71986bcf5ee4406bfccaa4079c5b20d.pdf?index=true
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_1421713da45b441faf18e53569b6cc8c.pdf?index=true
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_50996d45fe2541a5913c01f5df5c5045.pdf?index=true
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017a01.bin
e076dd48d64124af849fa61dfab3dd2895b08c88e1f5bc5482fe133ea3393666		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17A01 3832 bytes
font_01_sfnt_off000187ca.bin
2430e5a53a6ce4b7dc71de778256c4fb919614da302022089365cc7870ae3cc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x187CA 4996 bytes
font_02_sfnt_off000198c8.bin
a95c6d802dffa2599b87619d2d4371afcd882afc5dfd44a987ebd8f2d05edbe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x198C8 11856 bytes
font_03_sfnt_off0001c10f.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C10F 16312 bytes

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