Malicious PDF — malware analysis report

Static analysis result for SHA-256 92864fd72b30d98d…

MALICIOUS

PDF

74.2 KB Created: 2020-11-27 06:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 41ae0e609d399630538cfd4ea75c4ece SHA-1: 10cb17694c446bf0d58303359269b03ad6329a4c SHA-256: 92864fd72b30d98d19bdb24aedfadf71b42c6ecf3500cb6d268434f5d79bba54
214 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 and routes users through malicious redirector infrastructure. 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-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://ggtraff.ru/strik?utm_term=chi+nei+tsang+massage In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5fa90340201bd.pdfIn PDF document text
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/3586491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f99b5ecbcdfb.pdfIn PDF document text
    • https://wexegupewafux.weebly.com/uploads/1/3/4/4/134443826/voliwaropej_leposevepagope_nifemunovesul_rugikusudu.pdfIn PDF document text
    • https://dojarugakafep.weebly.com/uploads/1/3/4/4/134471698/ed60c.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/fomudebipefasu/aye_watan_tere_liye_piano_ringtone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b665f6-0875-44f6-86b0-ced330dc4fbd/825801713.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/chinnamani_kuyile_cut_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/653cb116-42e6-4394-b67c-3b51bc86027b/jorosagikogul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a752320a-5fc7-4b16-9f14-a76d5106a53a/ktvn_weather_reno_nv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0841494a-4107-4f32-a000-1f6338546be5/mituzimisewizuzodogopexo.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/hanuman_chalisa_telugu_download_ms_rama_rao.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58530f18-6e9f-4b9e-bafa-63ac58fe8049/new_years_day_superstitions_traditions.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/79190356015.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/48060678486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84eab7c6-577d-40dd-9dd2-7675db21f6c4/53852456658.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DE 4876 bytes
SHA-256: ce49d622844235fef510faf9c706ede4d564f3ceeaf4c2b89b5acef71abcdc01
font_01_sfnt_off0000e150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE150 10816 bytes
SHA-256: bb3c13d8b2a84d4712fdc9a5cb284846f1ca2cbe971cea709fa003587610b94f
font_02_sfnt_off0001064e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064E 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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