Malicious PDF — malware analysis report

Static analysis result for SHA-256 b34657eb7b01e966…

MALICIOUS

PDF

91.2 KB Created: 2021-06-12 03:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 88d39d762f4e046aa469167b00fe654b SHA-1: bdd39ac63f667eae92c7902b4ff46209c1790102 SHA-256: b34657eb7b01e966db97696ad69c61c18aab57c91a583cfbacd14fb085f0d81e
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting or potentially malicious domains, indicating a link farm designed to redirect users. ClamAV detected this as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of embedded URLs and the overall structure suggest an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • 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.
  • 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://irlanc.ru/pbw?utm_term=o+mera+bhola+hai+bhandari+kare+nandi+ki+sawari+shambhu+nath+shankar+nath PDF link annotation
    • https://zuramuvo.weebly.com/uploads/1/3/4/4/134480672/5a7c1db02.pdfIn PDF document text
    • https://muzunamarufo.weebly.com/uploads/1/3/4/4/134463020/jibawinexun.pdfIn PDF document text
    • https://volorizog.weebly.com/uploads/1/3/1/0/131070051/58eb3f9d28874a5.pdfIn PDF document text
    • https://nugekiva.weebly.com/uploads/1/3/5/3/135322430/sodeziveluwumu.pdfIn PDF document text
    • https://sizolofowexowar.weebly.com/uploads/1/3/5/3/135350689/d1f4876.pdfIn PDF document text
    • https://safusubugem.weebly.com/uploads/1/3/4/6/134609944/3126191.pdfIn PDF document text
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/ab9191c.pdfIn PDF document text
    • https://rixolojujosu.weebly.com/uploads/1/3/4/6/134622111/8266960.pdfIn PDF document text
    • https://pawuzoratifeze.weebly.com/uploads/1/3/4/4/134471058/10c76070a856.pdfIn PDF document text
    • https://wavuzujez.weebly.com/uploads/1/3/1/4/131406867/buribibun-wizuxazomefa.pdfIn PDF document text
    • https://wufaderafezika.weebly.com/uploads/1/3/0/7/130776219/7862894.pdfIn PDF document text
    • https://kojaxinepizoju.weebly.com/uploads/1/3/1/8/131856409/jafavukap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/7df38a19-594f-4778-8e61-767252778999/como_compartir_carpetas_en_red_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00440bf8-e793-4fb3-a80d-10fe126c0654/jewavadabowowevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6367d1f7-e049-40c8-aacd-7115cee16402/likekepalate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c655d7da-d6f0-4d5b-8e32-81c14f04ea97/how_to_reset_an_iphone_6_without_passcode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45dbe394-2f2c-4ce4-a33e-883d9ed2713a/95707816720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baafe5d0-6e5f-4995-808e-5b7bc27cf2ca/1490445295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad8a631-2fbe-4512-a89f-e055e364ab25/la_metamorfosis_de_kafka_anlisis_literario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29ffc7be-57a8-46fb-ae7e-d62e9d82db5e/85607959411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ce1cafb-2fb9-4a1e-bd76-c2acb1d5e5b8/top_video_editing_software_for_pc_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4540cba-f334-4a5e-adfa-f668ce1a6f1a/deployment_guide_for_securing_microsoft_office_365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70df3a6a-3cfb-4e08-8c2d-ba61e0da64d0/25149553596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4847eba4-cdcf-460f-842d-69c06f56fa9c/how_do_you_change_the_battery_in_a_weber_igniter_grill.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE325 5388 bytes
SHA-256: ce77a066eb48c56574b575370e4ef1673a1a22a5fb2e9ef15ec4623917687d27
font_01_sfnt_off0000f543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF543 5552 bytes
SHA-256: 681273857f7ec21314ed58328a6f8e380eb555953669e0db4ad138b0a281d752
font_02_sfnt_off0001094c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 10876 bytes
SHA-256: eecec335fedb4b285a6f93a634c3daf69fc7e30568aa4a188022c67f365ec925
font_03_sfnt_off00012e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2A 16284 bytes
SHA-256: effc6fc2d5d69e322b2667a1e93026ae73cd4b498b24574ddae25fac71d7e7fa
font_04_sfnt_off000143f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143F2 7348 bytes
SHA-256: 8b01a36a06632f97720b27bac2b9c695a23454e6cb126abf79cbf64878a0fbab