Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f861ea5e610492…

MALICIOUS

PDF

80.7 KB Created: 2021-03-30 22:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1c48beeef0b93a445821111511f94c9e SHA-1: 97d987d9d3ae682264bc671221c0e7116004274e SHA-256: 57f861ea5e610492cacd244e532aa27198a45e70d1af8fbc951efdfab148c0af
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 0.9967

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://ponafet.ru/strik?utm_term=10+types+of+figurative+language+and+examples PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471474/normal_60551e184b505.pdfIn PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/9569584.pdfIn PDF document text
    • http://kyhni.site/nakajifaneramokefifaz04wg.pdfIn PDF document text
    • http://creditscorehelp.info/72334671257mpo7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490974/normal_5ff0696f3aa29.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/datexevijiwewesiselap0sesk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388040/normal_6003dbd475ead.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/ciaigge/mevolaxoneri.pdfIn PDF document text
    • https://tiporedoxuva.weebly.com/uploads/1/3/0/7/130740235/f877f61e2ed.pdfIn PDF document text
    • http://wotomonexu.22web.org/bizamaderanilamonapoxat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376874/normal_604ab0f913160.pdfIn PDF document text
    • https://namoxatiki.weebly.com/uploads/1/3/4/4/134477177/mosogix_palujalomof_pozafarofuke_narun.pdfIn PDF document text
    • https://safesawugu.weebly.com/uploads/1/3/2/8/132814337/rofipipemurize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5fe76784c3e31.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/gfzhbaV/top_hits_of_the_60s_70s_and_80s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387410/normal_6044fccc63def.pdfIn PDF document text
    • http://espaceabonne.com/comptia_security_plus0izft.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/wuwetudopupun-jikek-bulosoma-wotozivepot.pdfIn PDF document text
    • https://cdn.sqhk.co/wijugilom/IE5ifie/flip_range_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/PmiiTOR/68409663163.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393190/normal_5ff9a9c05c31c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450746/normal_6041c375ed7d8.pdfIn PDF document text
    • https://cdn.sqhk.co/moturira/wgdfWjj/sea_empire_ap_human_geography.pdfIn PDF document text
    • http://cardioactiveitalia.site/google_dork_filetype_vs_ext7ry94.pdfIn PDF document text
    • http://telitogivel.iblogger.org/minanenasupanu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bubobebetoju.rf.gd/34822117212.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_off0000fb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB42 5688 bytes
SHA-256: 5374970e18045e8a973382f557689c0cce217aca4f6270f70e96d98fcd19c5c0
font_01_sfnt_off00010ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA3 11268 bytes
SHA-256: 8d476b1877c0e2b0fc0161ae8567783a3809206f1ced306cb6806019c9cbdef6

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