Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78ceefccb136213…

MALICIOUS

PDF

105.3 KB Created: 2021-05-15 01:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7a89c9e05ec6d6e9920f5adee0e1a8a9 SHA-1: 12e2e26a2fc15e49d50a2171deb7f1eefd0abacd SHA-256: d78ceefccb13621365383a51e2f7c7dd85bce30c4fad3011765e1af3758a2905
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9987

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=plantronics+backbeat+fit+3200+bluetooth+earbuds+true+wireless+sport+black+review PDF link annotation
    • https://nexitikobimefa.weebly.com/uploads/1/3/0/7/130776699/8796727ffcd516.pdfIn PDF document text
    • https://poxapoxidofex.weebly.com/uploads/1/3/4/0/134016688/1237873.pdfIn PDF document text
    • https://jakesekax.weebly.com/uploads/1/3/4/6/134623468/3b326922979.pdfIn PDF document text
    • https://puzemebakojufem.weebly.com/uploads/1/3/4/2/134234574/nodewesusavuku_kuratazukekuwu.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/equipment_damage_report.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/riwemalatagejenijukekur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_6040f5fb09f56.pdfIn PDF document text
    • http://takovevagagiv.scienceontheweb.net/bio_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413122/normal_5fd387858795d.pdfIn PDF document text
    • https://magagitu.weebly.com/uploads/1/3/5/9/135959352/498b1861992.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/vobuturinivi/76155080690.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/pathoma_2019_videos_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/wekezitesaferunidu.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/how_much_is_the_gaming_industry_worth_2019_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/american_express_platinum_contact_information.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/medapakuwup.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/begipuzovumivibitome.pdfIn PDF document text
    • https://4f870d4f-701c-4ec6-bbb3-7277acc5528a.filesusr.com/ugd/fdcb8d_c0683ff7e10c4161ae3e703e32c81a1c.pdf?index=trueIn PDF document text
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_1370e5992c7d4e5b852d8b3e4232ea86.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/34820240067.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/kemajuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/livre_pour_apprendre_le_francais_debutant.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000139e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E6 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off000149db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149DB 5920 bytes
SHA-256: 5ba8d84601fd9cc7712f622490d5453c4d98028d1058fa382f840c989ea8006e
font_02_sfnt_off00015e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E05 12604 bytes
SHA-256: a03f38553a8d3ed8ae65f3cfb374cdf2358409c32698fd58786f814953b84398
font_03_sfnt_off000187f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187F4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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