Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40f8dac717381dd…

MALICIOUS

PDF

73.2 KB Created: 2021-02-18 22:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 89be0f300f543297e954e42c14c2367f SHA-1: e83599549bb5d23836704bc19f058140920ba691 SHA-256: d40f8dac717381dd3166ab78e5cdd98ffd8a021a07d31fe8ec9b5911604c4cda
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded external URLs, forming a link farm, and a specific lure related to 'asphalt 8 mod apk unlimited money'. This suggests a phishing or malware distribution attempt, likely using the embedded links to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=asphalt+8+mod+apk+unlimited+money%252Banti-+ban PDF link annotation
    • http://peuly.xyz/tafseer_maariful_quran_englishg0tyh.pdfIn PDF document text
    • http://com-copyrighit.com/wojipifakuxengq3p.pdfIn PDF document text
    • http://jinitevuwug.iblogger.org/spanish_crossword_puzzle_worksheets_answers.pdfIn PDF document text
    • http://svoylend.xyz/isometric_font_templatecftmw.pdfIn PDF document text
    • https://dowisapi.weebly.com/uploads/1/3/4/2/134266119/b9763745e0.pdfIn PDF document text
    • http://goodsun.space/premam_movie_online_in_tamil_dubbedidusc.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/kabisebax/12841890002.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/mexuvawovisuzokufemiwidu.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/6940687535.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/sosidiwubibim.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/modaminatunikibo.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/template_iphone_xd.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/android_phone_tracker_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/wedding_march_violin_and_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/formule_chimique_sulfate_de_sodium.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/lajavowixixa.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/757699481.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/what_is_a_good_weakness_for_a_sales_interview.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_off0000e060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE060 5624 bytes
SHA-256: 6ec4be4cb978b2c81bea98194b4ac3ce10fe3204b1c4c71248745a68c83c1a93
font_01_sfnt_off0000f366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 10468 bytes
SHA-256: e703010f2a0d61afdfa1aa7f4bc5c527a07da01f189f10a587888355cb12db87

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