Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b2c3d538a7de7c…

MALICIOUS

PDF

82.0 KB Created: 2021-01-13 15:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1b0b5ffbac47cfa3affc55d8da847328 SHA-1: d7a2ecdaa55733441c99a4925d7ae374dff81c7b SHA-256: 21b2c3d538a7de7c45e5c6aa1334abbbb275d123e966cc39cf627ffc3f903a14
214 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'canape recipe PDF'. The presence of a malicious redirector and a large number of external links indicates an attempt to drive traffic to potentially malicious sites, likely for phishing or malware distribution.

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
  • 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=canape+recipe+pdf In PDF document text
    • https://faviretekomukuf.weebly.com/uploads/1/3/4/6/134606805/7004946.pdfIn PDF document text
    • https://site-1166749.mozfiles.com/files/1166749/66194700887.pdfIn PDF document text
    • https://sifixibufe.weebly.com/uploads/1/3/4/3/134348909/tulorekako.pdfIn PDF document text
    • https://ralixuviromod.weebly.com/uploads/1/3/5/3/135345966/kuwapupasugorireju.pdfIn PDF document text
    • https://melekutiruj.weebly.com/uploads/1/3/2/7/132740408/jusefi-sigakuguzuwebek-netawitu-wezosudizoxipoj.pdfIn PDF document text
    • https://lewagezu.weebly.com/uploads/1/3/4/3/134369469/6560990.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/wizuluworafid/11954527810.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/rewejofilozugapusom.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/jacoco_kotlin_report.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/qcm_histologie_de_l_appareil_digestif.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/heist_2_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/91893057968.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/86530282005.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/jipemejofopifufem.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED90 2968 bytes
SHA-256: 1c91280eb79ffdc858b6ecd2b9b1b9121e398c569f5702dd47e27479ee3b0056
font_01_sfnt_off0000f836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF836 4560 bytes
SHA-256: 915935ec8497fb918d5b62fa0793b814c659a3f714bfbc094f8eef4baa4a0167
font_02_sfnt_off000107b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B7 11320 bytes
SHA-256: ec14ebfe340ebd20692395bbf0411f7785b60915da0142399a42987b861d297d
font_03_sfnt_off00012d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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