Malicious PDF — malware analysis report

Static analysis result for SHA-256 483910679f5ba656…

MALICIOUS

PDF

79.0 KB Created: 2021-03-19 07:04:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5559a917f11c6958b253f07655b7b573 SHA-1: 214941d5b888917d293312fab3196c6a2b0b69c9 SHA-256: 483910679f5ba6562b4cc090e94b16c22e5f00b54478d5383a27a11b0e3df0ef
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 0.9998

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://xezojetit.ru/strik?utm_term=pl+sql+exit+while+loop+example PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369930/normal_601b162953b64.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/88593123897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410952/normal_602597fb249b4.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/sunitawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468294/normal_60432514be0c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471513/normal_5fecc789a2022.pdfIn PDF document text
    • http://fibiver.mygamesonline.org/pioneer_sph-da120_installation_manual.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/83334235981.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wutisigila/65804308899.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/captive_adjective_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/637fa76d-97bb-421d-87d0-5200f1222d40/givakebupuda.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/brazil_postal_code.pdfIn PDF document text
    • https://c220b530-f0c3-41ae-b07c-f0ad1ac24ac4.filesusr.com/ugd/a64c8c_e8a87224537442189421b2ead482d5af.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7082a5b4-965a-4a86-88fe-01c7f7dcff3c/how_do_i_get_my_unique_student_identifier.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/37361008183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb60f467-a05d-4f7c-84da-09cd267765fb/what_is_the_meaning_of_by_the_waters_of_babylon.pdfIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_7f7524fecabd412f83ac18446f19fc85.pdf?index=trueIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_e4aeef9d57954d2b854ea01cbcb49256.pdf?index=trueIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_76355bcefc3e407abb932449368bfa8f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/certificate_of_participation_sports_template.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_off0000f54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54A 5248 bytes
SHA-256: edc8a3345e6fc196c11ae26c33b5783541bcdf384a30beb77949dcd5259b339b
font_01_sfnt_off00010719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10719 11176 bytes
SHA-256: c6a3535c373e20c1d5fc641c6d3ff8e9c3875ecc5fc6494bb24ea91a863b29cf

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