Malicious PDF — malware analysis report

Static analysis result for SHA-256 9099878956286b26…

MALICIOUS

PDF

78.1 KB Created: 2021-03-01 01:15:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f6ab32cfa5f57fd5b0013d897dee8fc3 SHA-1: 1b196ff2bdebc44339a116f18683fb349f19c2b5 SHA-256: 9099878956286b262992946d675f9144a31976e5bd9bf13933fe3756126150bb
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 0.9996

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 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://crophysi.ru/wix?keyword=walking+dead+road+to+survival+armory+chart PDF link annotation
    • http://lobabinuladeri.medianewsonline.com/how_to_describe_the_moon_and_stars_came.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370317/normal_5ff8b82c45a55.pdfIn PDF document text
    • http://xatamekele.iblogger.org/smell_like_chloroform_means.pdfIn PDF document text
    • http://thedouche.xyz/jaxekiteginotalusiou86u.pdfIn PDF document text
    • http://maewallace.com/34575791214yserp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450340/normal_6006280d6cf09.pdfIn PDF document text
    • http://bubble1.space/81522499326t1pv2.pdfIn PDF document text
    • https://cdn.sqhk.co/rotefuver/h4oihja/xukekubalasup.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/igbH5vE/wowesef.pdfIn PDF document text
    • http://cookwellbakewell.com/xesutodidost2yg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_6018d79edbace.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/wubisu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suvalomimo.atwebpages.com/fuvupijaxarijibugewan.pdfIn PDF document text
    • http://sisuraregimu.rf.gd/chopin_revolutionary_etude_piano_sheet_music.pdfIn PDF document text
    • http://vexelikepe.epizy.com/beats_x_wireless_headphones_user_manual.pdfIn PDF document text
    • http://xojozefobulujox.epizy.com/dire_straits_brothers_in_arms_guitar.pdfIn PDF document text
    • http://mosujala.rf.gd/maths_linear_equations_questions_and_answers.pdfIn PDF document text
    • http://xebupiwemumak.rf.gd/44987861898.pdfIn PDF document text
    • http://fufopabi.rf.gd/52926000325.pdfIn PDF document text
    • http://zerowegujij.onlinewebshop.net/tonejud.pdfIn PDF document text
    • http://luparev.epizy.com/test_for_reducing_sugar.pdfIn PDF document text
    • http://pejonoma.epizy.com/comprehension_worksheets_for_13_year_olds.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34D 5592 bytes
SHA-256: 7aa00a0f19c0546704911d09cce2fff8f3f827522e0bb320cf9b3d82cd3bda2e
font_01_sfnt_off0001063d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063D 10504 bytes
SHA-256: 06e9131b88675ee764c7ec92c850286177abc31d05884fea78d2e3fb8141fe39

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