Malicious PDF — malware analysis report

Static analysis result for SHA-256 9daebf3deaf3bc23…

MALICIOUS

PDF

79.7 KB Created: 2021-03-17 21:14:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 45bd4e2dac626f72921b3707a9f2eca1 SHA-1: 4ed10a0f40725217c7bb7c3bb0496f72675e1194 SHA-256: 9daebf3deaf3bc2353b65b0025076994c7c2bf7544d61abc5f50be2dc3199285
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains and file-sharing services, indicating a link farm designed to distribute malicious content or conduct phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wix?keyword=maac+chula+vista PDF link annotation
    • http://discovljzg.fun/who_is_lady_gagas_husband_2019jojad.pdfIn PDF document text
    • http://temppicture.xyz/77691083122rz8qz.pdfIn PDF document text
    • http://wisecreditscore.info/maxi_cosi_mico_ap_infant_car_seat_manual60xil.pdfIn PDF document text
    • http://nominasacra.ru/gojuffp1jk.pdfIn PDF document text
    • http://fixetufuzafix.22web.org/85059439448.pdfIn PDF document text
    • http://laura-egorova.ru/kujalarilokubuq9s2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_207448632c674d90838392ea7f6b1601.pdf?index=trueIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_b3f0bff3e9c64f70beced94eb05a88bd.pdf?index=trueIn PDF document text
    • http://xokudotux.rf.gd/bsc_2nd_year_chemistry_practical_book.pdfIn PDF document text
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_bf1aebecbcc74f78837f6ed05d68f91a.pdf?index=trueIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_304f74039ae0492d85c52c53a8a3cf09.pdf?index=trueIn PDF document text
    • http://jifejibi.epizy.com/89765904787.pdfIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_a566010793224501aa64352bf71ee31f.pdf?index=trueIn PDF document text
    • http://kusofiwu.epizy.com/benaam_badshah_hd_video_songs.pdfIn PDF document text
    • http://zuvujivir.rf.gd/68052665679.pdfIn PDF document text
    • http://potopaf.epizy.com/4782891847.pdfIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_28883bab0325446abf0a15c43b0ad243.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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49D 4404 bytes
SHA-256: d75e9c0bad9b980cc83684ba9afab394f0120cedc7256a669f321bd89dd7857f
font_01_sfnt_off0000e38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38F 9160 bytes
SHA-256: 30cdb9f4416f2a84e20c79a03c9bafb0cd3057b224aad13092081d7d801cdbfe
font_02_sfnt_off0000fd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD59 11244 bytes
SHA-256: 7b8b19b2ec5abc82cb3f47af3a8eb1a2a8727322736a20ebe759bb4e97bfcbd8
font_03_sfnt_off000123a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f