Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a1d0c553459b1e…

MALICIOUS

PDF

75.2 KB Created: 2021-03-22 13:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 086fb3066cf55f6a23909c6c21366cd9 SHA-1: 3b166312d561e3e1b1f9129e1155f79491c654ed SHA-256: 27a1d0c553459b1ef86127e3967a8a56147ac48ab878bb01dfc56510c1c482e8
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded external links, many of which point to suspicious domains and are likely used to distribute further malware. The heuristic 'PDF_SEO_LINK_FARM' specifically flags the presence of numerous external PDF links, suggesting a link farm designed to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://ponafet.ru/award?keyword=acidity+and+basicity+in+organic+chemistry+pdf PDF link annotation
    • https://godivibodo.weebly.com/uploads/1/3/4/0/134040440/duxidiwamam-manifanu-lanetajipa-wujewefunuper.pdfIn PDF document text
    • http://waxopuvuru.22web.org/mobile_concrete_batching_plant.pdfIn PDF document text
    • https://lupemofuxuxutuj.weebly.com/uploads/1/3/1/3/131383332/d8fac37aa2de3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428329/normal_6022ec967114f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449604/normal_602f1216cb907.pdfIn PDF document text
    • https://gixobuwek.weebly.com/uploads/1/3/2/8/132815317/8844603.pdfIn PDF document text
    • https://gunagejosiva.weebly.com/uploads/1/3/0/7/130738835/rerukagujilepitipid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417207/normal_60097a1d45b68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muvusibose.rf.gd/kodunopotigikebaxemafab.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/84379739397.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/songs_with_i_v_vi_iv_progression.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/gomixezubiriw.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/skyrim_where_to_find_smithing_enchantment.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/gizidira.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/38857147352.pdfIn PDF document text
    • http://puwowega.epizy.com/equations_of_motion_problems_and_solutions.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_off0000e7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FF 5768 bytes
SHA-256: 19def00dd929bd9487d681eafa8dbebacb41faf51eb466a2dcd95cedc5ae42df
font_01_sfnt_off0000fb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7B 10572 bytes
SHA-256: 4efe44bc0ce0eb8fec20bd92f6d6cbc33d5bf92febea8d9a67f51b709d6c0da8

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