Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37e82e58061dfe8…

MALICIOUS

PDF

82.6 KB Created: 2021-01-02 14:21:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bea5786b71386352b78bc7a16d16a5be SHA-1: d587917b10be6b44d0d0307f118fbe1a725b9f9f SHA-256: d37e82e58061dfe82ff6b4d07b437a4749320733c43f029b50a75f7e28e9d255
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=shop+foreman+job+description+template'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, one of which is 'https://s3.amazonaws.com/tadovu/security_bank_personal_loan_application_form.pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://gettraff.ru/aws?utm_term=shop+foreman+job+description+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5fd19c7cc952a.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/MStjf9l/moving_to_another_state_checklist.pdfIn PDF document text
    • https://xonujofepip.weebly.com/uploads/1/3/4/3/134385468/ed5b00779d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496151/normal_5fc6907756bda.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/tadovu/security_bank_personal_loan_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/1440415249.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/coraline_book_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/vamurad.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/ravupiv.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/68235631375.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/mifexarosuzivetaxifapetud.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/weather_report_pune_akurdi.pdfIn PDF document text
    • https://s3.amazonaws.com/medadele/author_s_tone_worksheet_1.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/89497177284.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 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80A 5504 bytes
SHA-256: dac530de5c1d1ed3db16514814d3f0505db9599b55c793e8fa7b47284b9b2a83
font_01_sfnt_off00010a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8F 10948 bytes
SHA-256: ffd4277fc9c23c6f8e4e1c0ea7afa3fed0e69c185a514f9d2a0934e2c8b13200
font_02_sfnt_off00012f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F21 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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