Malicious PDF — malware analysis report

Static analysis result for SHA-256 386b685be1f3caf8…

MALICIOUS

PDF

107.8 KB Created: 2021-03-31 03:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: e56f5ca1015c7502d2e2849d711d70b1 SHA-1: 09367532fcd7d5750ada5d33a471091da0bc5b0d SHA-256: 386b685be1f3caf8133961d4d6500f27b3d8c4289a90e94b9b3036c1bddfc454
186 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as a link farm, containing a large number of external URIs pointing to potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the link farm suggests a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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://bologen.ru/123?utm_term=apanteles+sp+pdf PDF link annotation
    • http://verezitabel.66ghz.com/going_on_a_bear_hunt_activity_sheets.pdfIn PDF document text
    • http://afracheat6.xyz/hello_gif_adele_lionel_richiea8m9c.pdfIn PDF document text
    • http://finejubopitugov.22web.org/turobugasefetugoxe.pdfIn PDF document text
    • http://1cats.space/xoxosorepavaxupodexaxuvtposs.pdfIn PDF document text
    • http://losqutoq.online/ragagukurivigelou99iq.pdfIn PDF document text
    • http://kevotefanevodaw.iblogger.org/barepafesasujiponovufof.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/42202784470ei0wc.pdfIn PDF document text
    • http://detonic-de.website/moxuxoxodunuxesawexfjnb1.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/84b0f6a5-2056-4ee2-b701-49e6c80eb4d8/58632991908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af5a8a18-bfa2-4c33-9241-2c77269b84e9/california_zephyr_train_stops.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ab66b0-4912-4f69-8ca0-581c4c67881c/vezajanikupotonilavalen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5ff3be4-afe8-4cda-9ad4-697184daf8fe/19049439246.pdfIn PDF document text
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_87c25aa4452d43818bedb75d16145253.pdf?index=trueIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_0073d4096ac845a4a379cb443dd33c0f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rorives/53163113642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f838867-3b58-443c-83ff-2c0e96575b5f/53295563031.pdfIn PDF document text
    • https://7abbf572-6989-4614-8246-9d5ba34cd238.filesusr.com/ugd/af841b_3d1c6e626c4b4d65b030b2c79606999d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suxiweke/faithful_love_hymn_sheet_music.pdfIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_1b75fefdbd654a369b699e3e762161c9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcd7b94b-5832-49ad-a260-bd6fbec76ef5/classic_guitar_rock_songs_tabs.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_9dadcd19eb67431c9db62e31cb1f3919.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/doxifuba/tokyo_ghoul_manga_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce07cade-b6e2-4165-856c-440f0c97919e/15688157628.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001534f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1534F 4928 bytes
SHA-256: 0a82dd475d91bdfdff7315f9abccdd8e3b827c3eace6dacb2c003a095d5df950
font_01_sfnt_off00016428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16428 12204 bytes
SHA-256: c589b02c4dd68a441391d6280adbf17b34b151683f4cffee39545f21f66d4df8
font_02_sfnt_off00018cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CB4 16112 bytes
SHA-256: da133098c8ec00180ce5fe37c74b807b143adc5860869a2f7b6211e455203b10

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