Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0c4575b32205bc…

MALICIOUS

PDF

68.4 KB Created: 2021-01-29 16:30:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 14e7569afcd226af15635f522b79f751 SHA-1: 71e3d1c7008164f226c81ef19cdde10fb2c6eba7 SHA-256: bb0c4575b32205bcc8428ce7a849ba50bfaa36b36ab1ff777f2bb12489b498b3
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing or malware delivery. The embedded URLs and the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' suggest the primary goal is to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://crophysi.ru/123?utm_term=mega+man+30th+anniversary+bundle In PDF document text
    • http://morpeoplelife.ru/ashitaka_and_san_piano_sheet_musicf4go3.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/hiN5hAf/heart_gold_soul_silver_triumphant_card_list.pdfIn PDF document text
    • https://xododasewa.weebly.com/uploads/1/3/4/6/134600374/wolinutezaze.pdfIn PDF document text
    • http://d2-club.ru/nigijepikomedilibupob1m4is.pdfIn PDF document text
    • https://cdn.sqhk.co/mudinaxape/6ighhrO/air_hockey_table_game.pdfIn PDF document text
    • http://xbet1.fun/83375967013sslwv.pdfIn PDF document text
    • http://dresdenpharma.ru/ejercicios_de_tangramjsqwf.pdfIn PDF document text
    • https://lazogipinu.weebly.com/uploads/1/3/1/0/131069887/6832853.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/8H5m6c6/zombix_online_mod_apk_unlimited_money.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/3c0a2bca4e9.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/xapota/air_quality_measurement.pdfIn PDF document text
    • http://zafurug.epizy.com/dunesafivevigiw.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/kumatorabamidatefumuw.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/asme_b16_5_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/bemefikixobevanesuv.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/57785413914.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/xitenifoforawemolimi.pdfIn PDF document text
    • http://pamiwumewamem.epizy.com/25781711714.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/8307575279.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/south_asia_map.pdfIn PDF document text
    • http://disobaratid.rf.gd/81806994239.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_off0000cb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB39 5852 bytes
SHA-256: 06b32d64234e5e5721fbd8c7dc27f06de96469cf0f8c454ad9625afe2ede340d
font_01_sfnt_off0000df0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0F 11204 bytes
SHA-256: 9e4c587407ab8eb75c5fed10f9a278db6201c0075b9066dd324cb8232123fc15

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