Malicious PDF — malware analysis report

Static analysis result for SHA-256 da55246054b089c5…

MALICIOUS

PDF

67.2 KB Created: 2021-03-29 22:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ba2d141b8fa1bb12783caa43d885e63f SHA-1: 9a418bc374f6d31fcc3e41ce8669d5cff8744d44 SHA-256: da55246054b089c5ee0c73d9ee7d807f9702262f1c502fbfc65cd0eada64bdbe
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, and detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous external links, with one prominent URL pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to a wireless controller, likely to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=ipega+wireless+controller+9023 PDF link annotation
    • https://ruletovijijiz.weebly.com/uploads/1/3/4/6/134602869/637e14.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/gjm1hga/xinok.pdfIn PDF document text
    • http://gamuxiwami.getenjoyment.net/65725134095.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/9637314.pdfIn PDF document text
    • https://cdn.sqhk.co/jimevexir/ihPhjIV/kixenoxinoxutedodurud.pdfIn PDF document text
    • https://titugujogimob.weebly.com/uploads/1/3/4/0/134017720/e97337326ad09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vasakuzepilaxi.onlinewebshop.net/kalnirnay_calendar_january_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/baratza_vario_user_manual.pdfIn PDF document text
    • http://palexibibiw.atwebpages.com/22568993448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcff76c8-edcd-46ac-85d4-990c2a7992d5/how_do_i_get_started_with_my_apple_pencil.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/99958495335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7ab03c-d129-4abd-bacf-dfe512e1ed5b/acoustimass_10_series_5_review.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/what_are_the_4_types_of_contamination_hazards.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/biditinetelebiwubuzonita.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/the_lion_and_the_mouse_book_by_jerry_pinkney.pdfIn PDF document text
    • http://wawukekaxemiju.epizy.com/pukogukatezavigemikivu.pdfIn PDF document text
    • http://xofajekebukup.rf.gd/how_to_use_gopro_hero_4_black_as_webcam.pdfIn PDF document text
    • http://puwavunetese.rf.gd/veberinixisupiwolosu.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/hioki_ir4056-_20_data_sheet.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_off0000c61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61B 5724 bytes
SHA-256: d90cdc59b6feaf566102ac24a9dab011a5c490138d0544e1bb1984ddf057378f
font_01_sfnt_off0000d9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BA 11356 bytes
SHA-256: 101bccfd77465bcf152af76294c2f697f8f2c6f6d5d1e63d374eb21349a27806

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