Malicious PDF — malware analysis report

Static analysis result for SHA-256 c647c0ef8a6a76c2…

MALICIOUS

PDF

75.7 KB Created: 2021-03-13 17:00:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b3c128093b9c2d9e70ae8ac06c34b91f SHA-1: e34921c7042d45ef96264d2cefc7a087f67a4de7 SHA-256: c647c0ef8a6a76c2d619cfad0114bf45e926286606487952f784b9a730dc5cdf
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

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
  • 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.
  • 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://bologen.ru/wb?keyword=convertir%20de%20fracciones%20de%20pulgadas%20a%20milimetros PDF link annotation
    • https://lonunirixug.weebly.com/uploads/1/3/2/7/132710494/8668408.pdfIn PDF document text
    • https://nifixivenugoku.weebly.com/uploads/1/3/1/8/131856212/tutavaz_foboduxakofa_lelani_tivezoneg.pdfIn PDF document text
    • https://girezerel.weebly.com/uploads/1/3/1/0/131070389/75d535b6dd.pdfIn PDF document text
    • https://dazutexigamufo.weebly.com/uploads/1/3/2/7/132740900/d7a5e6a1cfb25e4.pdfIn PDF document text
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/944e40fd207a693.pdfIn PDF document text
    • http://mozujana.22web.org/fibaruwadosiza.pdfIn PDF document text
    • http://copyrightmediahelp.com/37229699005mlrjq.pdfIn PDF document text
    • http://jelolizabuvixi.22web.org/rca_universal_remote_code_search_for_magnavox_tv.pdfIn PDF document text
    • http://fb-copyright-help-from.com/topizifaxogitexukekarts1m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zabevog/formation_biodiversit_urbaine.pdfIn PDF document text
    • http://badiwiv.epizy.com/womut.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/mezujuginupujiv.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/the_natural_rate_of_unemployment_is_quizlet_macroeconomics.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/modular_kitchen_acrylic_sheet.pdfIn PDF document text
    • http://wumuduwowuwi.rf.gd/terakusogibe.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/cyanogenmod_7_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/5_languages_of_love_book_price.pdfIn PDF document text
    • http://vubimefiz.epizy.com/19039018974.pdfIn PDF document text
    • http://vemesedesalo.rf.gd/samonude.pdfIn PDF document text
    • http://tufelorit.rf.gd/80467150274.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 5440 bytes
SHA-256: ba70adbf5a6b54e9249597b44dde1fc898b7b8b5097b69bd84a9fd4e2202ead0
font_01_sfnt_off0000eaef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEF 11672 bytes
SHA-256: a6880eb04db1712bef9a49d7307038bbb4c7714f68008298e7d4fcddf35ebd3a
font_02_sfnt_off0001113e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113E 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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