Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1db5d3b9c21429…

MALICIOUS

PDF

77.3 KB Created: 2021-03-08 05:24:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9a16c4f84db4fcf1312c70ae48206060 SHA-1: 46971f63665d45d9b25c3f288ac3a28f7d50e11b SHA-256: fc1db5d3b9c2142937961a444334260cd1daa088398caa7703bfe294a14e1832
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to earthquake information, intended to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=que+sucede+en+los+terremotos PDF link annotation
    • http://fejekadiwoxobiz.getenjoyment.net/dlink_dir_601_manual.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/how_much_did_indie_games_make.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386607/normal_600e7373d794f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_601d2d44e0661.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_603bece73c5f2.pdfIn PDF document text
    • http://kepuxom.mypressonline.com/what_should_i_accomplish_in_the_first_90_days.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/listening_comprehension_exercises_for_grade_4.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/pack_n_play_mattress_pad_walmart.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/the_lord_of_the_rings_the_fellowship_of_the_ring_script.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420020/normal_60357c7f5f103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492275/normal_5ff48d0339cac.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/jutenojamega/how_to_use_aimpoint_red_dot.pdfIn PDF document text
    • http://takefaluzimun.rf.gd/double_gate_fold_template_indesign.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/35328615147.pdfIn PDF document text
    • http://nizowozutagele.atwebpages.com/94466824759.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/penefujurefonugate.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/28504252165.pdfIn PDF document text
    • http://dujulekofolurad.rf.gd/sikaxipopi.pdfIn PDF document text
    • http://fisowafoz.epizy.com/heap_analyzer_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/somufivujomukopelarogos.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/edit_text_box_fill.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/24681798097.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_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 4936 bytes
SHA-256: b0c6293073d7e58cbd7ec14bc04d642b24fcefe687a9ac1a00fdd214b138ead9
font_01_sfnt_off0000ff4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4A 12104 bytes
SHA-256: 6005ff03ed6341438e91f4c68be88391b63a5928479b12e5eb0387ff24916c7c

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