Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d58b9070c0b3d01…

MALICIOUS

PDF

102.1 KB Created: 2021-04-02 21:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5add1d8e52895d95ce0ad4c7c6e3aebd SHA-1: 8908e76d5e38aabf5585ad7d8367eda776bad0bd SHA-256: 7d58b9070c0b3d01b9b22192755d706101a950a116587366b1303446c623c501
214 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with at least two identified as malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of malicious links points to an attempt to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://dafemum.ru/123?utm_term=twinkle+khanna+books In PDF document text
    • http://mozuganimaf.66ghz.com/barry_white_love_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/sozetojedisu/jehecie/76236612198.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/9xiibh6/gofowi.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://uploads.strikinglycdn.com/files/d0744ec3-9ec4-4996-8af2-d23fbb44b63f/fegix.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/fractions_and_percentages_worksheets_year_5.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/jeveguxobi.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/worumar.pdfIn PDF document text
    • http://womipir.rf.gd/mawigudul.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/forrest_mims_iii_books.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/30209238104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c5b6e2-8136-4319-a8d8-9167a8657c00/what_does_it_mean_when_you_dream_you_and_your_sister_are_pregnant.pdfIn PDF document text
    • https://b42dfab6-8227-42c4-8fe5-fc04d9433513.filesusr.com/ugd/a9a8df_3b74e83ed1a94bbfbe976fd36fb24266.pdf?index=trueIn PDF document text
    • https://71347f20-8353-4153-bebc-dd2a28b3a5cf.filesusr.com/ugd/a382ee_5f3d3782d2844d24a39929c667728929.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zukogi/vetekit.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/the_four_movie_cast.pdfIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_44850f22035c4721ae33b26d7d5d9797.pdf?index=trueIn PDF document text
    • https://49d0234c-aae4-472d-9cb9-6192e9e03354.filesusr.com/ugd/a63595_efdd4df54bb84e7cb0ecd955fd816ba5.pdf?index=trueIn PDF document text
    • https://a9d1d3ec-13fa-4b7e-abe1-abe2c2ba1301.filesusr.com/ugd/f83029_7c6c39b6e9344b5bbe0d971caa4b9042.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3873cd9f-78ba-4c91-b9d7-81e392bff567/87784747778.pdfIn PDF document text
    • http://femejedad.epizy.com/identifying_hundreds_tens_and_ones_worksheets.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001311d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311D 4632 bytes
SHA-256: 1ee44062e3ad74f86ab8b4bb581201003e5bbb1190979e08c9a8a91bbb5a1e4a
font_01_sfnt_off000140cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140CB 11436 bytes
SHA-256: da49e3ec0361095d1fe82ad1a084d36ffd4d7e76c4c97d33801d81355ce2cacf
font_02_sfnt_off00016784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16784 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
font_03_sfnt_off00017c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C99 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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