Malicious PDF — malware analysis report

Static analysis result for SHA-256 31a446948faacf3e…

MALICIOUS

PDF

101.6 KB Created: 2021-02-27 01:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5f508e5a9ec88eed6f74c4432988a73 SHA-1: 334c378c08cdaa49528956ee85d91a6452a53a34 SHA-256: 31a446948faacf3e8a5eb700c2bdc97758e630f539d1b4750916f9a22c581214
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. The document body, though heavily obfuscated, suggests a lure related to a PDF download, aligning with the detected external URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/aws?utm_term=fledgling+octavia+butler+pdf+download
    • https://lerelapukuvi.weebly.com/uploads/1/3/0/7/130740054/zoviv.pdf
    • https://litolojinoforiw.weebly.com/uploads/1/3/4/7/134721995/3237859.pdf
    • https://nizevamil.weebly.com/uploads/1/3/2/8/132814567/323862.pdf
    • http://vas-rem.ru/kervan_ilahisi_szleri_indirufzmy.pdf
    • http://digitalmicroteter.xyz/super_mario_bros_2_theme_piano_sheet_musichg0lq.pdf
    • http://zodelem.mygamesonline.org/how_do_you_reset_a_honeywell_thermostat.pdf
    • http://ccckkkkk.space/self_determination_worksheets6bxtq.pdf
    • https://bazeneta.weebly.com/uploads/1/3/0/8/130813787/1623736.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://kapirexazi.onlinewebshop.net/zigijuxowugorevosuso.pdf
    • http://zaxalamel.rf.gd/dodupixogarogokuwobexikej.pdf
    • https://s3.amazonaws.com/wovugi/jipinilizalojiwogizut.pdf
    • http://wezojepodi.rf.gd/worksheet_of_conjunction_for_class_5th.pdf
    • https://s3.amazonaws.com/gekixadonuru/vita_di_galileo_b_brecht.pdf
    • http://movuzog.rf.gd/how_to_answer_police_competency_questions.pdf
    • http://salivokeru.epizy.com/matsec_examiners_report_2016.pdf
    • https://s3.amazonaws.com/sefiwegegagu/82528231557.pdf
    • https://s3.amazonaws.com/jakujakula/32731783148.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011afc.bin
598bfab3057893cd8314028b44886826dca1c193a7af9de77cf56ed49372e385		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFC 5392 bytes
font_01_sfnt_off00012d73.bin
cefa93ab99268b9387626336cc8aeb986d802f3a091f6156c231f0642977bfab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D73 1852 bytes
font_02_sfnt_off00013643.bin
070190071500e4e782f35bfd755afae89b66324ef3097a980fd68c75fb9893f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13643 5852 bytes
font_03_sfnt_off000144fd.bin
ee02895dff8c4d323ce05c3d15ac62d9c9844f822054f83c62779fbdf48b6449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144FD 15944 bytes
font_04_sfnt_off000172df.bin
378ba5569bb666bbcf62f6b10ce7b1b17e3ec70dff13df96b0486da8cd924b4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x172DF 16064 bytes

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