Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a1609d881fe8b0…

MALICIOUS

PDF

79.1 KB Created: 2021-05-25 10:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c582a05ee1197f2a9a8dbbb0eb008df2 SHA-1: f51dea5cf190831b1c80a1e8b642ae898311f923 SHA-256: a6a1609d881fe8b051a1c31379fb6b7dad35e855b8916ade37dedcdb5b68fd2c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9995

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://nipisod.ru/strik?utm_term=dibujos+para+unir+numeros+del+1+al+100 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401971/normal_60697d9c10c05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_604dca33a664c.pdfIn PDF document text
    • https://bimaruzo.weebly.com/uploads/1/3/4/5/134517483/6372916.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465396/normal_5ff66042a5f01.pdfIn PDF document text
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/nosazalu-guruzukasaxifo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407983/normal_6041487e1ec55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_60615636293f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385202/normal_604dc53ebe0df.pdfIn PDF document text
    • https://zadidiboz.weebly.com/uploads/1/3/5/2/135295834/zetenegibo-kibusulidumebo.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://s3.amazonaws.com/najipavez/palayathu_amman_hd_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/14956659124.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/lubapivapuminesexodofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2caa773-e519-4684-ae3f-db98d4474f0e/xewawazawekevosixowifapim.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/how_to_spend_less_without_being_miserable.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/how_to_pair_kwikset_910_with_alexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722023a2-e1d4-4483-8406-7639e40934ed/easy_piano_songs_for_beginners_jingle_bells.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/jared_leto_joker_makeup_transformation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0bd07ab-3c6b-43be-a614-1213179fafeb/49110382141.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/personal_statement_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/1807598181.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/arborist_knot_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cb522b1-32ef-4426-aa39-ef1054b018cd/what_drives_you_everyday_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0D 5316 bytes
SHA-256: efdb57eb8652a271535609320bcc5aa30764f079322dd8f06595e197622d78e8
font_01_sfnt_off0000fbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF4 11364 bytes
SHA-256: 11ecd20b323f9bc8d3b9ad0a7b823a6b9ddcbfc99ccd6b9deb2e9563a487c90d
font_02_sfnt_off000120e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.