Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9057fbf68e7214a…

MALICIOUS

PDF

75.2 KB Created: 2021-04-01 20:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5a8c83660d35496cde4d8dd76146faaa SHA-1: a892dfa345bfdb92f502745604416bc5d9910e86 SHA-256: b9057fbf68e7214a50d9692a9f1d8513acc538d6a8d5bf9f8b1ebf84aa2c2ed7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=cash+flow+statement+pdf+class+12 PDF link annotation
    • https://cdn.sqhk.co/zobelekivix/jgwjhii/mummy_returns_full_movie_in_telugu_movierulz.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/jfghhVw/hide_and_seek_chinese_movie_ending.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/1Mxhfia/how_to_make_fluffy_slime_without_borax_youtube.pdfIn PDF document text
    • https://worivoka.weebly.com/uploads/1/3/4/5/134588103/2626345.pdfIn PDF document text
    • https://kutobuxuvesoga.weebly.com/uploads/1/3/0/7/130740510/c2e1ec5.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/hcw7Icj/taxuzekowinipasi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobosebaj.rf.gd/lizuvimuxagux.pdfIn PDF document text
    • http://numivonef.rf.gd/pirerifiputodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c114e1-6232-4b3d-ab82-75d9fdcaa393/at_lp60_belt_setup.pdfIn PDF document text
    • http://sewevikefusox.epizy.com/mugebawuramalobusopinini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfde8f37-a701-419e-a8d0-e3eabddc8af6/gagojesowolum.pdfIn PDF document text
    • http://wuxekijonudi.epizy.com/real_book_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/lolagipekov.pdfIn PDF document text
    • http://pesuvomekujidi.rf.gd/defence_law_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/906fe168-82ba-4b7c-9bc8-a691065a98c7/18383463269.pdfIn PDF document text
    • http://giwetov.epizy.com/teoria_da_argumentao.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e664fdf3-11a9-42f3-b542-11d94a21528a/kisalotanajudipime.pdfIn PDF document text
    • http://nureresew.epizy.com/tiwoxojigabufirivenopanit.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/auslander_liveness.pdfIn PDF document text
    • http://jiwoxofor.rf.gd/berger_paints_annual_report.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87C 5480 bytes
SHA-256: a5f36e51917addd5cd73f2f93a316ffe4c62a844db05eb53cc51c2f1d64607fd
font_01_sfnt_off0000fb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 10892 bytes
SHA-256: 405512e850f7dd336e96bb3c2118527f861f345cc4b2ece6ce0d49f2e4f2458a

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