Malicious PDF — malware analysis report

Static analysis result for SHA-256 04497190f433fc1d…

MALICIOUS

PDF

73.5 KB Created: 2021-02-18 23:31:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: de2f4c344b6a3a6d585d7df6907f9bd8 SHA-1: 4ee0a506eebae5d8cc0b20440200b1067b9cfdbc SHA-256: 04497190f433fc1dc3a99934e30bfd30321c94f143a3075f81563790bc071efb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The primary URL points to a website that appears to be part of a SEO-driven content farm, likely intended to host malicious content or phishing pages. While no scripts were explicitly extracted, the PDF structure and extensive external linking strongly suggest an attempt to redirect the user to a malicious site, potentially for further exploitation.

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
  • 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://jacksth.ru/wix?keyword=the+metamorphosis+chapter+3+questions+and+answers PDF link annotation
    • http://4gusevshop.space/english_language_teaching_in_pakistanujalg.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvonazavo/MgiPkpz/18968105965.pdfIn PDF document text
    • https://boferisavupase.weebly.com/uploads/1/3/1/3/131384298/safepibupuno_bimilos.pdfIn PDF document text
    • https://cdn.sqhk.co/gujipiror/ePhazx2/piwageni.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/oHIiiig/basketball_images_full_hd_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/13ASehd/rudovutujojojoviwitobitet.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/fhfnYjh/47029513266.pdfIn PDF document text
    • http://operationhomeplate.com/reading_comprehension_grade_2_worksheet77nh8.pdfIn PDF document text
    • http://makamar.online/ludigifemuxogavolynzyo.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/jjhhhgL/color_palette_challenge_deviantart.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/dazutun/answer_you_meaning_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/jukixofix.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/vmware_snapshot_performance_degradation.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/all_caste_list_in_up.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_off0000e27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27F 5612 bytes
SHA-256: 2d951a99ec71fd5caf5f73442aee698dd0d53460067074309c706cbb7a02ddbb
font_01_sfnt_off0000f56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56E 10380 bytes
SHA-256: 745aa54759755bc3a321f465a8ec829c3f82d5715aea230c6df01bfbff4dd18c

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