Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9459afe8feb88a…

MALICIOUS

PDF

88.5 KB Created: 2021-03-09 02:24:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 012008acd3ae87271275401e17d0a51f SHA-1: 51cd48bd69b0b0bc4caa4adda2bb5403d32fb79a SHA-256: 4f9459afe8feb88a4f39c20bd5bcad6d9fe9299faa011deb14f8ca84aca6eabe
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the presence of external URIs and the overall classification suggest this PDF is designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • 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://gimoguvi.ru/award?keyword=accounting+theory+research+regulation+and+accounting+practice+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393647/normal_5fffc5ffba1dc.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/sigexibo2dbjg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367294/normal_600058702b7a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417675/normal_5fcb0b14c4144.pdfIn PDF document text
    • http://bigpleasure.ru/pokemon_emerald_xy_walkthrough_walls_cheat_code6pwnj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382643/normal_600f7b8e67c49.pdfIn PDF document text
    • https://cdn.sqhk.co/gixobujikelu/gjngdml/espn_the_magazine_subscription_account.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464082/normal_600d5d32d39dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464873/normal_601554f55799a.pdfIn PDF document text
    • http://neojust.ru/si_units_conversion_worksheet_with_answersak887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5fe825177fbe0.pdfIn PDF document text
    • http://amandeepsadyora.com/vonovaxoguvewizitu6y7el.pdfIn PDF document text
    • https://cdn.sqhk.co/zopinulepa/fnjhVjd/riviwenox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378623/normal_5ff7f3821ac06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_601d371d34043.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/f5407a2e-10e1-43d3-9a47-e8a0deaabd5d/90211084008.pdfIn PDF document text
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_0b70a3d736a14b21b3e828b17ede6e9f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c405f660-99cd-4628-8034-1a8b472d1720/golf_teeing_off_tips.pdfIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_12ef4b57ceb54470ad7ab4e3fa4dd4c6.pdf?index=trueIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_2ef8c741e00b4faa9c5f5301df12de0b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d96a2686-1869-4106-ad61-1b4a696b343c/1248330530.pdfIn PDF document text
    • https://f9c380c0-3c9a-404e-8c76-a924832b335c.filesusr.com/ugd/9c8fb9_6f7e96ce8c5d4638935d455e102d4676.pdf?index=trueIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000e93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93A 6588 bytes
SHA-256: b3260a8b27c40a1c9408c40b3dcfb9ec9ded560232013cbc1ca8de37ebb5a831
font_01_sfnt_off0000f9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 5508 bytes
SHA-256: 2bc3c30495d145ff299f595be3a1099de71371a0a2550696a57601e99a3c997c
font_02_sfnt_off00010c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C74 2924 bytes
SHA-256: 4a7cb244add02a1b68fea71dd8f82eb8ce3375fff077073faa63549213b9916c
font_03_sfnt_off000118c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C8 10540 bytes
SHA-256: 31136c3d0b819a5106aeef24ca2086e2df562150c7993cd45a14e8655be63a35
font_04_sfnt_off00013ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCD 16416 bytes
SHA-256: b1a7be413c16529a3efb36790fb1ede9dbc47b99b1dcf399fe3ce16d881d47c9