Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5c2164623267a5…

MALICIOUS

PDF

75.9 KB Created: 2021-05-23 19:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 53b1e8b09c3871c0e904fe01f01c79b0 SHA-1: 9d37b83d921a3d9abb3a2e916d7582bd4385e7a7 SHA-256: ee5c2164623267a58becce043e90e6b2a754f74d5e92e43e5e10c5bc73f6191e
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 0.9997

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://pelibifir.ru/strik?utm_term=replika+personality+traits PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406771/normal_606136ea922d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456165/normal_601f2097b0734.pdfIn PDF document text
    • https://ropugobefele.weebly.com/uploads/1/3/4/4/134445072/9485209.pdfIn PDF document text
    • https://lusabosebab.weebly.com/uploads/1/3/5/9/135972845/830fa691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_605d662003fa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466411/normal_60117c33bf9e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477630/normal_602b0a29e2b1b.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/desekusoxi/android_10_mi_a2_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d558e1-e3d8-42df-af3a-4b93271687d3/rowenta_iron_auto_shut_off_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/30946493063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c47588e-0b5e-4a6a-abd7-12badcc0eb89/mta_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830f6782-22f4-43d5-a765-d22553638a08/ti_84_plus_ce_games_mario_kart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65e9f8f-ee31-4aa8-a8f0-982ec819d281/87914675311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2010b398-4851-4cdc-a5a3-6890e9f454c2/how_to_use_the_deluxe_ez_bow_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ee2fe85-7049-4667-97c8-1a6a32e51ab5/84214771608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/492f6482-7727-4e86-9bbb-d81bb1e7d88f/how_often_should_you_change_transmission_fluid_honda_accord.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd40618-7ea7-420a-8496-db3ff07ae967/87962836863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/568ec375-f70e-4d05-ad59-ea98650b1b62/tokebizixitadoralul.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/brain_on_fire_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/molunamipufibugur.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/32315769901.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_off0000ecfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFD 4984 bytes
SHA-256: bb1d06787f5659782c621daf600f590572f7fe1b3caa3e4fa89dff22ae0fb96c
font_01_sfnt_off0000fe08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE08 10740 bytes
SHA-256: 0a16d404dc33f6c61082d315325464294fc74f380484846dd1f3526f648a1920

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