Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6835cfbd44b8bc…

MALICIOUS

PDF

83.0 KB Created: 2021-04-03 23:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 32bcafea5522cc87977a3b845bcc9e71 SHA-1: e4e7242f77f8bec359ef417b3d0174434b02973c SHA-256: 1e6835cfbd44b8bc69f529fca66f508bc88235558c1e24c28b55feca60ad4ec2
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 and routes users through malicious redirector infrastructure. 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=ipad+mini+5+price+in+india+2019 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4445750/normal_5fe27cac9ac98.pdfIn PDF document text
    • http://parrrtner.xyz/wedding_anniversary_punjabi_songpduzu.pdfIn PDF document text
    • http://lessonsonline.site/auto_chess_mobile_guide_strategyzw2go.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401994/normal_5fd04da52ca5c.pdfIn PDF document text
    • http://kajejib.medianewsonline.com/hyperbole_and_a_half_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/VsiiSjc/76299685332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449973/normal_6063cd4c73c8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480588/normal_60465b542741b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_602a10012312e.pdfIn PDF document text
    • http://xizerunax.scienceontheweb.net/3836323110.pdfIn PDF document text
    • http://lighterusb24.site/esv_bible_downloadoa9k1.pdfIn PDF document text
    • https://cdn.sqhk.co/dabizogi/WcjgspI/32114157465.pdfIn PDF document text
    • https://cdn.sqhk.co/jobolekul/agiSkG6/galifawofimikefogujugaj.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
    • https://s3.amazonaws.com/ladojenefe/raxasafakiza.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/alternative_energy_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/58360574049.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE305 5148 bytes
SHA-256: fedc7decf96c2207c6614555898162f7acc1a7f71766670c6053c2a720686882
font_01_sfnt_off0000f45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45D 11236 bytes
SHA-256: 92e2850a9a4e5e52214370240b04234cee36ec526709607bbad6d0f36dc6e3cc
font_02_sfnt_off00011aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAD 16192 bytes
SHA-256: 24f4b12fa3c6db61703244677f1cf9939cf6462fb11ae4e1ecf6bb929b126f65
font_03_sfnt_off00012ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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