Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a0e354ee526b6a…

MALICIOUS

PDF

65.7 KB Created: 2021-02-12 17:22:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7012e38c1ef30d527ffb8a0bb8d97cb9 SHA-1: eac2f209d221b996b3954821ec873bbb51d31047 SHA-256: e6a0e354ee526b6a70d42bf84ac3f194d010ff164d50e6d54377a5b71bf74b0a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, characteristic of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to potentially malicious sites or download further payloads.

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://jacksth.ru/123?utm_term=the+essentials+of+computer+organization+and+architecture+fifth+edition+pdf PDF link annotation
    • http://cupe1.ru/world_cup_2022_qualifiers_asias14nq.pdfIn PDF document text
    • https://kivobuduzuv.weebly.com/uploads/1/3/0/7/130739084/mobepelanavidoxeze.pdfIn PDF document text
    • https://buwuwewofopalun.weebly.com/uploads/1/3/4/0/134097592/8273384.pdfIn PDF document text
    • https://gajokemijibefe.weebly.com/uploads/1/3/4/4/134467094/3733036.pdfIn PDF document text
    • https://nemanuvipiza.weebly.com/uploads/1/3/1/3/131398236/878c9711d.pdfIn PDF document text
    • https://nuzozixajalupik.weebly.com/uploads/1/3/0/7/130739607/toronavi.pdfIn PDF document text
    • https://sokifaxus.weebly.com/uploads/1/3/4/6/134666683/9915173.pdfIn PDF document text
    • http://xiwotafajiloluf.22web.org/beamforming_gain_db.pdfIn PDF document text
    • http://ryursew.space/the_godking_s_legacy_wikir2hy0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazawojob/xogagaginorasob.pdfIn PDF document text
    • http://mulozeraxepe.epizy.com/kegunegufunadutodubiwif.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/vofinafisotivomadaxato.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/sheet_street_pillows.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/numberformatexception_java_8.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/limits_of_accuracy_worksheet_and_answers.pdfIn PDF document text
    • http://kolofagigetu.epizy.com/advantage_and_disadvantage_of_computer_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/hwy_1_traffic_report_abbotsford.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/black_satin_cowl_neck_dress_missguided.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_off0000c04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC04B 5568 bytes
SHA-256: 212db33163704fc1150eb901b4dd486c16b9aacf3885409ed84380428d40994a
font_01_sfnt_off0000d317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD317 10684 bytes
SHA-256: b46d262219dc8193639af14ba140dd8f594289ad5f630a6b398e35b42a0a0187

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