Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f445bda8059753…

MALICIOUS

PDF

75.8 KB Created: 2021-04-13 12:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6970ab1f3541f94a5e2b8606941d4415 SHA-1: 9019408822c7a4a82c463e693d6bebe0d715517c SHA-256: 08f445bda805975374814307f1b336cf74f6202a44e56b400f334de7d8473b40
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-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://midufefew.ru/strik?utm_term=link+download+microsoft+project+2010 PDF link annotation
    • http://astrohelp.space/708419708327g62d.pdfIn PDF document text
    • http://chambreop.xyz/11166928711s16t7.pdfIn PDF document text
    • http://qqkaxes.xyz/kenmore_500_washing_machine_not_spinningyofhq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500446/normal_60488d0dba3d5.pdfIn PDF document text
    • http://beduzevitugok.mypressonline.com/word_families_noun_verb_adjective_adverb.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/205949209.pdfIn PDF document text
    • http://krokoboko6.xyz/ashraf_ali_thanvi_contribution_in_psychologynqjqr.pdfIn PDF document text
    • http://sweetmeet.online/88913548740ndll4.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/mirerixawe.pdfIn PDF document text
    • http://jushq.pro/piano_adventures_primer_theory_booklubzw.pdfIn PDF document text
    • http://help-copyrightservice.xyz/32392490420f7d2c.pdfIn PDF document text
    • http://amorexpo.com/hungry_shark_world_para_pcbch3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426075/normal_5fe0c79c6a073.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_241ac543ac204724bd513a893e3ec444.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/65185055456.pdfIn PDF document text
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_5fc67d906b1e4baaba6ed45c01c04f8d.pdf?index=trueIn PDF document text
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_9a45b94264c94f3cafa6fd4b2ba8b73b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugumeb/lidugudenetizowotowakime.pdfIn PDF document text
    • https://99ca13e2-8bf0-45b2-93fa-bbfb519f101f.filesusr.com/ugd/5392be_afd795a058b6447093a3c35f44642299.pdf?index=trueIn PDF document text
    • http://semowomeso.onlinewebshop.net/kilevomopizebu.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/9571110046.pdfIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_b65da89c23484d3488dbb6e1f14a0fa0.pdf?index=trueIn 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_off0000e7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B8 5800 bytes
SHA-256: e988c6c4bbaca3a18fda6dc2f1b8fb49607782dfc313a89a8aeb79227090d5a0
font_01_sfnt_off0000fb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 10796 bytes
SHA-256: 522dbcd9267cd973710580a0393adf34c8b516b368632544f95c043e41d17fa2

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