Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd32e4b6b40cd1f…

MALICIOUS

PDF

109.0 KB Created: 2021-03-30 05:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8b8a8fcb798d46cdf1472612ead881ac SHA-1: 1006104a5b290ad1fb8b17771ad64c7a8d1b0a56 SHA-256: fbd32e4b6b40cd1f5b1e4ca90ff097cd630e4fb4fdf838b332dd6de744b5646a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/award?keyword=orden+alismatales+pdf PDF link annotation
    • http://zomolejefej.mywebcommunity.org/strategic_management_book_pearson.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/21205425864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495696/normal_6028c5b1d197b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_60247edc6370d.pdfIn PDF document text
    • http://gejopuzebizovuk.iblogger.org/all_odia_album_song_free.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/89991080963.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/95658adffba3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_60361ffd4bf5c.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/iit_delhi_gate_2020_syllabus.pdfIn PDF document text
    • http://wigomufeze.22web.org/62343152689.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/54451195328.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450042/normal_5fdfa00640d0b.pdfIn PDF document text
    • https://rogefuza.weebly.com/uploads/1/3/4/6/134688393/7664851.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://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_7266861374c547f3945fd65a2c76fefa.pdf?index=trueIn PDF document text
    • http://wuwedilejom.myartsonline.com/the_count_of_monte_cristo_short_version.pdfIn PDF document text
    • http://zuzopejorexa.onlinewebshop.net/pejuzodijafa.pdfIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_fd93db37fa754d0db93a1ce653215c27.pdf?index=trueIn PDF document text
    • http://boxijekew.atwebpages.com/wowodaniwalusetosu.pdfIn PDF document text
    • http://xumuritikoxuk.myartsonline.com/systems_performance_enterprise_and_the_cloud_brendan_gregg.pdfIn PDF document text
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_58b91094742b419a9e4977feddf6da3a.pdf?index=trueIn 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_off00015e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E96 4892 bytes
SHA-256: 4fca61996ad9a5bcca0b7df5d8eeffed2cfd2dddf5e6d94fa9e84e0ec3fc8208
font_01_sfnt_off00016f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F17 12844 bytes
SHA-256: 2dac2d53d3d50bed723aadb770657ef35410007e3595ec370808712b92aed67b
font_02_sfnt_off00019781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19781 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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