Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc75eda202109d8…

MALICIOUS

PDF

86.5 KB Created: 2021-02-25 23:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 553e9a6302624ee189d6be84b9063d07 SHA-1: b760d5a7344ca54674fcc0fea0e7f5261e972cde SHA-256: ccc75eda202109d87d377dffac3b8a07f83677be262c07c763210415ad857161
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document instructs users to copy/paste content into a shell, a common tactic for executing malicious commands. The presence of external URLs, including a link farm, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://baarspo.ru/123?utm_term=how+to+stop+first+alert+smoke+alarm+from+chirping PDF link annotation
    • https://vazewelekataba.weebly.com/uploads/1/3/1/6/131606588/894784.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387920/normal_6004590cce629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480161/normal_602dd551661fe.pdfIn PDF document text
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/fibetopodo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393761/normal_600368e1b5011.pdfIn PDF document text
    • https://lifufokawalujiw.weebly.com/uploads/1/3/4/6/134687559/fimubasotopubalo.pdfIn PDF document text
    • http://kanijakagiw.iblogger.org/barfi_songs_itti_si_hansi.pdfIn PDF document text
    • http://peregukejipesa.iblogger.org/advantages_and_disadvantages_of_spreadsheet_software.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/niwotipugonuvoz/balwyn_high_school_second_hand_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/77457275781.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/jemid.pdfIn PDF document text
    • http://soburuwukipo.epizy.com/59990996569.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/metal_forming_book.pdfIn PDF document text
    • http://lefarobi.rf.gd/b_w_px_headphones_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/bathampton_manor_cqc_report.pdfIn PDF document text
    • http://tenowuwewid.epizy.com/42386022415.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/boyds_bear_value_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/zekenokufexixipasodik.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_off0001124c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124C 5548 bytes
SHA-256: d70272ede889fa5894b6b1f0dfc232ea4f639d9d66d05df7534fc99fec7821d1
font_01_sfnt_off00012513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12513 10932 bytes
SHA-256: 7d2f7f8c9a223a364b94d02b11c99bd981e845682242b76c446b5e7c70b769cd

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