Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ec916662e65ee4…

MALICIOUS

PDF

65.8 KB Created: 2021-02-20 06:49:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 42160073de940638c39c1c849f16e85e SHA-1: 95ff92a77b03f4344aa2bf70c0f52fd7d4423477 SHA-256: a3ec916662e65ee457a099c2168875da7540c13cd79055ecc595b01fd2903c8c
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one pointing to 'maypoin.ru', suggesting a phishing or SEO spam campaign. The PDF structure and embedded links are indicative of techniques used to redirect users to potentially harmful websites.

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://maypoin.ru/wix?keyword=american+hunter+rd+pro+feeder+manual PDF link annotation
    • https://cdn.sqhk.co/vugomupuzisa/jTbQMjb/american_euro_truck_simulator_2_download_free.pdfIn PDF document text
    • https://pakilimog.weebly.com/uploads/1/3/4/3/134363837/kanelokujujo.pdfIn PDF document text
    • http://hurleyshamburgers.com/mofuwexemixopwazi.pdfIn PDF document text
    • http://reduslimer.website/afl_finals_series_format8g2ci.pdfIn PDF document text
    • https://vurabagugodemox.weebly.com/uploads/1/3/1/1/131164039/df5fd82f1.pdfIn PDF document text
    • http://opsnatur.fun/soxinonomivi2vmaz.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/zqpsiaR/ordinal_data_analysis.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/lorifawuvawot/parallel_lines_and_transversals_packet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/tomidegodinuxumuwag.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/cardiomyopathy_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/miss_universe_1969_final_question_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/39460297983.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/manchester_united_vs_arsenal_video.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/biblia_ortodoxa_noul_testament.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/camera_shutter_sound.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/wabigebitaperar.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/32081235903.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/toxizasabozuxivebak.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_off0000c72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72B 5204 bytes
SHA-256: 929281e19a93585b1a5004f7282866e18159a78611625db340d719aa593e3dfe
font_01_sfnt_off0000d8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B2 9780 bytes
SHA-256: d07cdc4552b0efbdc1109a6fc0e393049aff01c7ddbb219852681e950689694a

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