Malicious PDF — malware analysis report

Static analysis result for SHA-256 126417f31bb8174d…

MALICIOUS

PDF

73.4 KB Created: 2020-12-31 21:55:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7cc437ccb3d6cbbe72d07ace93324ec0 SHA-1: 97b6a40b40b3df4aa24af58b8a2194864e230671 SHA-256: 126417f31bb8174dd2f797100dc010e3d54029d95eb523b979f12f0ac8520e19
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is classified as malicious due to its structure and embedded URLs. It contains a heuristic firing indicating a link farm with numerous external PDF links, suggesting an attempt to manipulate search engine rankings or redirect users to malicious sites. The primary malicious URL identified is traffking.ru. While no scripts were explicitly extracted, the PDF structure and the presence of external links are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffking.ru/strik?utm_term=green+pepper+calories PDF link annotation
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/9009541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_5f98ce90cd4a9.pdfIn PDF document text
    • https://verosogoteri.weebly.com/uploads/1/3/4/7/134738646/tigotowuxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5f913277388ec.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://uploads.strikinglycdn.com/files/c2ecb14a-af95-4bad-a6c7-018f3bc021a3/armitron_watch_instructions_wr330_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b79e8eb-1834-411c-8c7e-233c54af5e64/gukozefexarisarovelal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae33d6e1-338b-4b56-bf55-c6b4ecd874a3/79898668973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/664a46c9-f66d-495d-ad5a-7b3693a9eb04/drastic_ds_emulator_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/382ac8e8-7910-45ce-9020-eadef5250ff7/59239099460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eeba744-4958-4ba8-a1b1-719f2cdfa3c3/workbook_for_diagnostic_medical_sonography_answers_obstetrics_and_gynecology.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD589 4664 bytes
SHA-256: 9e84e304a9c20ef9298d4b46bfaa0b6292d4a153f2c9c7e10477111d950459eb
font_01_sfnt_off0000e559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE559 11156 bytes
SHA-256: c669ded241e029d5d2ca9c856ec0a978937adad6df8213e26639453a005df9a0
font_02_sfnt_off00010b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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