Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d2999671baddbc…

MALICIOUS

PDF

83.5 KB Created: 2021-03-04 17:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 00bc2f078647ddce2ff4cea53298dd1c SHA-1: 6b61b8ceb39252512a0997dbfdba58345b647291 SHA-256: e1d2999671baddbcde38ce383a3964cd62a9eab012a6072b2d2aaeeab93c029c
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The document body itself contains a mix of URLs and text related to 'how to put apple magic mouse into pairing mode', suggesting a lure for phishing or credential harvesting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://xivitazekovobun.weebly.com/uploads/1/3/4/5/134596583/xalozavo.pdf In PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/statistical_quality_control_ppt_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/munuvesevejefaral.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/el_llano_en_llamas_cuentos_completos.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/chairmanship_honor.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/bulbul_video_song_kannada.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/zilubewigaditibumi.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/vikatava.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/93247179893.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/63182659604.pdfIn PDF document text
    • https://gotagifegu.weebly.com/uploads/1/3/1/6/131607164/xasepefutunusu.pdfIn PDF document text
    • https://vifozafep.weebly.com/uploads/1/3/1/4/131407061/poviwojutufefuve.pdfIn PDF document text
    • https://rusipamisu.weebly.com/uploads/1/3/4/0/134017355/8183131.pdfIn PDF document text
    • http://kadesevi.iblogger.org/91915479191.pdfIn PDF document text
    • http://zitugaxusi.mygamesonline.org/focusrite_scarlett_2i4_2nd_gen_usb_audio_interface_with_pro_tools.pdfIn PDF document text
    • https://leonvi.ru/wb?keyword=how%20to%20put%20apple%20magic%20mouse%20into%20pairing%20modePDF link annotation
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/CopyrightIn extracted file (font_00_sfnt_off0000ecb0.bin)
    • http://www.typoland.com/In extracted file (font_00_sfnt_off0000ecb0.bin)
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off0000fc4f.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off0000fc4f.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off0001316f.bin)
    • http://gixarewujedel.atwebpages.com/how_to_read_schematics_electrical.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c93f83-9f22-4192-964a-a2f9646b0b5f/76059053724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53601b51-0864-4ea4-a3d6-d0a0b081939b/alone_together_filipino_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b403037d-9d2f-463f-aece-77523f32a491/2429931175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe98ecfb-d2bc-46aa-86ca-0bd8e067f81b/sevimovuwijexafar.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/mathematics_workbook_class_8.pdfIn PDF document text
    • http://juropap.rf.gd/11689710351.pdfIn PDF document text
    • http://puwagof.rf.gd/bed_sheets_on_sale_australia.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 extracted file (font_00_sfnt_off0000ecb0.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB0 6168 bytes
SHA-256: 9f07a400e75c177e496f395344003d4a7545e118b36bf59d530d47f9bb3550f8
font_01_sfnt_off0000fc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4F 5328 bytes
SHA-256: 0fcde82b8b648ad08a51186af6bad0575b14bff0f03a5e284ba9271abb3939bd
font_02_sfnt_off00010e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5D 10228 bytes
SHA-256: b13c8c0b583b69beabf3c5ae5e569a444632264e1c0c102bacceec3cb94f6158
font_03_sfnt_off0001316f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361