Malicious PDF — malware analysis report

Static analysis result for SHA-256 6accf30a5b7037c6…

MALICIOUS

PDF

88.3 KB Created: 2021-02-01 11:03:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f289aa8368539ce0c6c21d161100b330 SHA-1: 4eee7fb69ebe6937093bd0eba45930724a9c4dbc SHA-256: 6accf30a5b7037c63cc205ea5e4e235853a0edb6d668a8e2f34c85a4e3751c0d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or direct users to malicious sites. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The embedded URLs, such as 'https://jottigo.ru/123?utm_term=oversized+bath+towels+bulk', are likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://jottigo.ru/123?utm_term=oversized+bath+towels+bulk PDF link annotation
    • https://cdn.sqhk.co/riteximeras/hf1TShb/64065835419.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464541/normal_600139b82673b.pdfIn PDF document text
    • https://kazirevuteguzug.weebly.com/uploads/1/3/2/6/132681824/zazok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_60126368c8356.pdfIn PDF document text
    • http://lnstagramcentre.net/spss_veri_analizi_ders_notlariwg5d.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/5HibZF0/87452141521.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/h2jjtjx/beat_cop_game_engine.pdfIn PDF document text
    • https://cdn.sqhk.co/jeposanop/cidxFft/tupowiwibadenivipatafowe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387918/normal_60088aa2b1294.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/gfKgdlK/all_creatures_great_and_small_2020_cast_tonight.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366007/normal_5fe1a49f1100d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451212/normal_5fcf0bf03979a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDD 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off00010ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC2 5120 bytes
SHA-256: faacab909c9eb7339f4fd0e64798d32cb095db1b9451603ecdf337afba8fca0a
font_02_sfnt_off00012060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12060 10980 bytes
SHA-256: 6d6dc225e7a374317531defeb14371756179b96bbcbf08121c6e920cf85869de
font_03_sfnt_off00014572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14572 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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