Malicious PDF — malware analysis report

Static analysis result for SHA-256 3571af49f7103d95…

MALICIOUS

PDF

79.6 KB Created: 2021-03-22 04:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1467e56dd6c00d29fd0276808f973478 SHA-1: 1b637ee5927c1b3adb94320493206992f3af2b19 SHA-256: 3571af49f7103d95829a45839b8109fea2d44a475756a7fd1b10222b3ee75f03
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains and are likely part of a link farm or SEO poisoning scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

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://xajibur.ru/wix?keyword=congress+for+kids.net%252Fconstitution PDF link annotation
    • https://tererenigi.weebly.com/uploads/1/3/1/4/131405956/6924545.pdfIn PDF document text
    • https://komolelavox.weebly.com/uploads/1/3/4/5/134518501/bozijobuvete.pdfIn PDF document text
    • https://fedonofawok.weebly.com/uploads/1/3/4/8/134881994/9681565.pdfIn PDF document text
    • https://rekakugiraki.weebly.com/uploads/1/3/4/6/134623504/8c16eac4d68.pdfIn PDF document text
    • https://rowiteruna.weebly.com/uploads/1/3/4/4/134470704/4d3e8ec4.pdfIn PDF document text
    • http://pexiwaz.iblogger.org/xafafolowuzimuromom.pdfIn PDF document text
    • https://xuredetinumimo.weebly.com/uploads/1/3/4/6/134630251/nenaton.pdfIn PDF document text
    • http://turoliwejaxafux.22web.org/adquation_formation_professionnelle_et_emploi.pdfIn PDF document text
    • https://lepamatizetu.weebly.com/uploads/1/3/0/7/130739269/ece5bf.pdfIn PDF document text
    • https://nefupoxuwuridek.weebly.com/uploads/1/3/4/7/134747690/rutuvanoresito.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rodixotezogas.rf.gd/87998182701.pdfIn PDF document text
    • http://kakogajoxe.epizy.com/zasavofumomukixomafaziru.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/adding_dissimilar_fractions_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/85468717138.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/lufojisatugesakan.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/pupozed.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/65772521667.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/37878666647.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/54112500719.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99B 4984 bytes
SHA-256: c26cd5b94d6cb75bc7dda32c8fc38d6221bbcad8d6c665c71c7ea8fb938c1623
font_01_sfnt_off00010ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB4 10864 bytes
SHA-256: 1a32699879c083ec3dd6cd5950e11c026bae20199b32e3716b2fc0e772d1dad0

Open this report in the interactive analyzer, or submit your own file for analysis.