Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3a66ee8a60e3d8…

MALICIOUS

PDF

80.6 KB Created: 2021-06-11 18:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be841200520f7944aaea472b9d85d320 SHA-1: dffc0225088a4de622bc407fa31510aa31d53e83 SHA-256: 1f3a66ee8a60e3d89c61c0faefb8ce07bdaea9f3e06f9971095f892af4637f32
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as benign documents but lead to potentially malicious sites, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and the ClamAV detection. The primary malicious URL identified is 'https://smidgel.ru/pbw?utm_term=kung+fu+panda+3+full+movie+download+in+telugu', which is presented as a lure for movie downloads. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to malicious content, likely involving JavaScript execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://smidgel.ru/pbw?utm_term=kung+fu+panda+3+full+movie+download+in+telugu
    • https://gupamawuma.weebly.com/uploads/1/3/4/6/134602371/6824816.pdf
    • https://static.s123-cdn-static-d.com/uploads/4465565/normal_60b698dbce325.pdf
    • https://cdn-cms.f-static.net/uploads/4392857/normal_605c5fca91fcc.pdf
    • https://potisejomi.weebly.com/uploads/1/3/6/0/136092970/9335757.pdf
    • https://static.s123-cdn-static.com/uploads/4379718/normal_600862dcbb4dc.pdf
    • https://static.s123-cdn-static-d.com/uploads/4491934/normal_60b268e6daf84.pdf
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/4042297.pdf
    • https://cdn-cms.f-static.net/uploads/4401994/normal_600ce22318285.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5a905e32-e89a-4425-8508-2e5989d01630/nixon_watch_battery_size_chart.pdf
    • https://uploads.strikinglycdn.com/files/c8079e0f-fbf3-4820-b68e-47e41d4cf91b/best_memory_card_for_zoom_h4n_pro.pdf
    • https://uploads.strikinglycdn.com/files/6dd6f673-b40c-4e64-81c4-6d8a4f4a3cef/sat_math_2_curve.pdf
    • http://gufikugefisu.pbworks.com/f/how_to_draw_a_reflected_ceiling_plan_by_hand.pdf
    • http://vogituvu.pbworks.com/w/file/fetch/144885633/apk_vpn_unblock.pdf
    • https://uploads.strikinglycdn.com/files/5d57efad-bafb-4185-a149-bf80e12a2e5a/28621809704.pdf
    • https://uploads.strikinglycdn.com/files/34500b6a-bbf2-4292-aed1-668c4c795056/46783073342.pdf
    • http://nosiravuga.pbworks.com/w/file/fetch/144470049/easy_recovery_essentials_for_windows_7_64_bit_free_download.pdf
    • https://uploads.strikinglycdn.com/files/3ba4dd42-926a-404c-ad8e-c16f6e188142/john_deere_lawn_mower_oil_change_kit.pdf
    • https://uploads.strikinglycdn.com/files/fd57c16d-4dd6-4a53-ac11-c2c3a907062a/fofutida.pdf
    • https://uploads.strikinglycdn.com/files/628f2017-eecc-49a7-9ea4-db0c857d5fd8/what_type_of_music_is_popular_in_south_korea.pdf
    • https://uploads.strikinglycdn.com/files/5d20a030-fce1-43f2-b630-1e480e8152fe/kemokiwotanokudomekoku.pdf
    • https://uploads.strikinglycdn.com/files/d7ac264b-5b72-4586-a035-caff73b76a70/mivipufavepi.pdf
    • https://uploads.strikinglycdn.com/files/2b934795-aec8-46a1-b8cc-5a4e2a5c48b4/how_to_use_a_convection_oven_microwave.pdf
    • https://uploads.strikinglycdn.com/files/33f8f320-ff69-45ce-98f9-b224307c248f/android_wacom_bamboo_driver_ctl-671.pdf
    • http://gamaxidad.pbworks.com/f/positivist_research_paradigm.pdf
    • http://lodedeti.pbworks.com/f/diamond_platnumz_mawazo.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea4b.bin
127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4B 6744 bytes
font_01_sfnt_off0000fb32.bin
c7d1b4c5d5a394af935879dc0a817c1f43479134fcc63e8954241e84e42b6cd8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB32 5372 bytes
font_02_sfnt_off00010d93.bin
b2704699337561e186853ef42cc99639f97374ae16334a2a57c0185728d35150
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D93 11392 bytes