Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24e65ef235cd868…

MALICIOUS

PDF

77.2 KB Created: 2021-03-06 02:21:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 834a47b403bc5fd0c2c70424b6b7ce69 SHA-1: 77d3c135b8a38bf6f4d9ec9308676fff3ebc3b49 SHA-256: f24e65ef235cd8688731446d180afe2229bad6b9f79c1258e05e6d4aaf42cd3e
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains multiple external URIs, with one specifically using a search term ('excellence in business communication 6th canadian edition pdf download') to appear as a legitimate download link, while actually pointing to a suspicious domain (jumiwimov.ru). The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/123?utm_term=excellence+in+business+communication+6th+canadian+edition+pdf+download PDF link annotation
    • http://busivel.xyz/jeopardy_template_for_powerpoint_with_soundunncv.pdfIn PDF document text
    • http://setofexperience.site/pasevoxrkhs1.pdfIn PDF document text
    • http://thiswaytovogue.com/favumenowefejz08sb.pdfIn PDF document text
    • http://meetchat.space/adobe_acrobat_x_pro_reduce_size3fen9.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/nfl_head_coach_pc_download_full_free5nxt4.pdfIn PDF document text
    • http://kemytbok.xyz/hp_8600_plus_printhead_errorhg1mp.pdfIn PDF document text
    • http://albatros-trans.ru/nike_sunglass_replacement_partslx6hj.pdfIn PDF document text
    • http://lady-bug.club/movoponitoronunurstph4.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/baahubali_1_tamil_dubbed_moviebqijt.pdfIn PDF document text
    • http://aslixan.com/where_to_watch_stephen_kings_it_2017r6z2d.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/pirates_of_the_caribbean_piano_sheet_musicb3e0d.pdfIn PDF document text
    • http://cpskras.website/md3060_allison_transmission_manualf5mxa.pdfIn PDF document text
    • http://stylecurtains.com/670171522121tvik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3a7b682b-4b85-4b21-836a-a34929c8735b.filesusr.com/ugd/0cd3a8_381c14c7038a4fad8052115efbd11edf.pdf?index=trueIn PDF document text
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_582f4486d66a4f79aa2059d160f13bfe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/bakobavogijex.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/54586938430.pdfIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_0c3cae35d67148f28d863c60a3d9917c.pdf?index=trueIn PDF document text
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_8e45ddd5c2cb4979883bf76d47cc6991.pdf?index=trueIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_663922f41ca44d47b38b8eae32235ce8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/98247419261.pdfIn PDF document text
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_9abfa3568f32458ca2680ed9c328f26e.pdf?index=trueIn PDF document text
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_e2374ac67d7d4755ba29a1ee05ae65ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/battle_brothers_dlc_guide.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_off0000efe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE1 5708 bytes
SHA-256: f06366151f95f66dc182746f7e527bd76ecd015694cde6daf39a70e6fd2612ae
font_01_sfnt_off0001033a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033A 10452 bytes
SHA-256: 3723adb03e3ac58d78bc9194ee7642218d0f45a78627473502a252f728922601