Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d54647990be224…

MALICIOUS

PDF

70.3 KB Created: 2020-12-02 15:11:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2e2afb5c3e3dc9d07a15da0f40c60393 SHA-1: b232e99de6a95d10df6e1ea59533791909c33c4c SHA-256: 69d54647990be22483559a9db9294998f9182a9bff7e436ea2c0de659c07727b
214 Risk Score

Malware Insights

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

The PDF contains embedded links, with one critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Minecraft skin generator apk', suggesting a lure. The presence of embedded URLs and the ML classifier's high confidence score strongly indicate a malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?utm_term=minecraft+skin+generator+apk In PDF document text
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/4a1c55c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e6b83dfdd95b60d5131d/t/5fc373527acac6192a2ca3d7/1606644563353/fajadafetovufalovutowi.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/77987917609.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc371da40f1034a5cb9132c/t/5fc6124f145a8629dc8186b8/1606816349679/identifying_tone_and_mood_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/bright_house_change_of_ownership_form.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07dde27a199023ab34438/t/5fc15c9e2dd96f5918225c6c/1606507678823/sims_3_toddler_clothes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28998403f5353fda0357a/t/5fc52fc4e18c5c478ea2aad4/1606758340643/82779277856.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58e5668612547ed7d9951/t/5fc62ef23570fb44d1d5623f/1606823667533/halloween_brick_breaker_program_in_java.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf59d49ee0f32b874afdc5/1606375900888/temogekolu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d6f9ff13940aa24c3a4c/t/5fc6893e173fb5383b878716/1606846792272/reapers_realm_hours.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf53e89ee0f32b874a84a0/1606374384805/modern_combat_5_apk_and_obb_file_download_compressed.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/how_to_quote_poems_purdue_owl.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_off0000d703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD703 5220 bytes
SHA-256: de4246acb3f1e4196de85627afc48c20216381785bc0ccf05ce3343d6722c606
font_01_sfnt_off0000e8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EE 10612 bytes
SHA-256: 428eba040e35c5b2faecad93394ce67e82634f43a9700d50db0dfae0ada32c0b

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