Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8759cf0e67fd5d2…

MALICIOUS

PDF

74.9 KB Created: 2021-06-08 15:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0f84db0a3966efbc2446ae36dd082b7b SHA-1: 51e1a73c237eb54d7041d873184785afebd5f82b SHA-256: a8759cf0e67fd5d27553b7d2add1f8796aac7ec4b774878da105434eadbe6c8c
226 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to disposable hosting and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness. The heuristic 'SE_REMOTE_SUPPORT_LURE' suggests the document might be instructing users to install remote support tools, which is a common tactic for phishing or malware delivery. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://pixomot.ru/pbw?utm_term=main+tenu+samjhawan+ki+female+mp3+song+download+raagtune PDF link annotation
    • https://purolitawi.weebly.com/uploads/1/3/4/8/134894903/wogase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401519/normal_6068ab0614ada.pdfIn PDF document text
    • https://fetagurekejoj.weebly.com/uploads/1/3/2/7/132741571/8550660.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421768/normal_5fcf224f23d2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384471/normal_5ff540c782593.pdfIn PDF document text
    • https://dubiroki.weebly.com/uploads/1/3/1/4/131483307/e59a722.pdfIn PDF document text
    • https://xiliwawegumokap.weebly.com/uploads/1/3/4/0/134096460/4fe41bfbc967.pdfIn PDF document text
    • https://zavomejuguz.weebly.com/uploads/1/3/1/1/131163615/xenukojoxuxak.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/f14c6e9b-7414-4635-88b0-fa97fde66499/what_does_taotao_mean_in_chamorro.pdfIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144726087/javuzijolereb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2ac2b6-4c5d-4bea-bb76-0cc91fd8b911/carrom_disc_pool_mod_apk_android_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb70189-c36f-4a73-8b9e-4ac60bc5e3a4/used_snapper_mowers_for_sale_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/987626db-7b7c-41f3-9c97-4316aba887ab/85977204246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62e352bb-c5e5-42e9-8ccd-acf5df3f1c2f/is_civil_engineering_a_good_career_in_india.pdfIn PDF document text
    • http://kumarifili.pbworks.com/f/the_gift_of_the_magi_story_questions.pdfIn PDF document text
    • http://palixazoke.pbworks.com/w/file/fetch/144411711/checkpoint_firewall_advanced_troubleshooting_guide.pdfIn PDF document text
    • http://tijigika.pbworks.com/w/file/fetch/144684090/3790836766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ab7c99-2aeb-4c06-aeae-00d9407b5d09/carry_on_bag_size_alaska.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f5a62d-3a12-43e8-97fc-17ac29260a44/64359337195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c695224-4c5e-4373-b45d-16d8224e8c4f/how_to_find_the_slope_between_two_given_points.pdfIn PDF document text
    • http://wusajigi.pbworks.com/f/31126024608.pdfIn PDF document text
    • http://degenazi.pbworks.com/f/realtek_hd_audio_manager_download_windows_10_asus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f768249-6555-4e8a-a2d3-f09d47fbf43f/line_6_bass_pod_xt_live_review.pdfIn PDF document text
    • http://nanefumipopo.pbworks.com/w/file/fetch/144569640/getutakinevakapotozaseva.pdfIn PDF document text
    • http://jabevexizoj.pbworks.com/w/file/fetch/144722238/hisense_smart_tv_remote_control_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffba4c4a-52b5-4c98-87dc-dbcd55e086f9/50178016386.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_off0000e75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75F 5856 bytes
SHA-256: ec1bc2fa1d16bc94c86561100051f05aaa896b2119d5d69626e542d1d6d7b83d
font_01_sfnt_off0000fb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4B 10104 bytes
SHA-256: 403431bf558dc564acc494a1b51e56f5fb2084c9f7c1179b1458dde14680570a

Open this report in the interactive analyzer, or submit your own file for analysis.