PDF malware analysis — malicious · 6fae693893ff295e

MALICIOUS

PDF

92.8 KB Created: 2021-03-24 17:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 7188c6aea7d95abefa05a0e6e041f806 SHA-1: 20822f25f7f3866e655669a3b248cdc19f63f080 SHA-256: 6fae693893ff295edc51444142d594e1c8f32089633128723170893d5601ee51

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including a link farm on disposable hosting, suggests a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Star Trek Discovery' and 'free online', likely serving as a lure to entice users to click on the embedded malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 6

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 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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://mezovuduw.ru/strik?utm_term=star+trek+discovery+episode+1+free+online PDF link annotation
- http://povulofi.mywebcommunity.org/metodologia_de_la_investigacion_cientifica_hernandez_sampieri.pdfIn PDF document text
- http://losinglotterynumbers.com/mefunutuvumha6bc.pdfIn PDF document text
- http://nijalatol.mypressonline.com/52175628387.pdfIn PDF document text
- http://openchambre.xyz/dakushwiw4.pdfIn PDF document text
- http://jumpfs.space/23021153701g7aiv.pdfIn PDF document text
- http://xivobivivupe.mygamesonline.org/jekumigarilabazalodak.pdfIn PDF document text
- http://ririzobe.medianewsonline.com/lekubemitasodevogob.pdfIn PDF document text
- http://varietystore.website/tableau_your_data_by_daniel_g._murraydfuco.pdfIn PDF document text
- http://xtina.online/35722856313tz8na.pdfIn PDF document text
- http://loveantravel.xyz/jifaweduoaud5.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://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_7cc9ed622a9a42a78b2e6752a3b912c6.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/13766ba0-76c6-4e22-af8e-1d34335566a9/matademijodajeba.pdfIn PDF document text
- https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_e4b165edbb8345a98b0aae63d6a57102.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/5e5e6ab7-d39c-40dc-b0a8-fa66ba3656b6/85966582909.pdfIn PDF document text
- http://kepofif.onlinewebshop.net/service_pack_3_windows_media_player_version_10_for_android.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/82c40583-4cce-4db8-a1ab-6ffed3caeda8/60945515421.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2c60c714-8995-4db9-a61d-2defd73e6e0f/garmin_920xt_replacement_strap.pdfIn PDF document text
- https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_b3b8690724e543d19d04abd12764e0d8.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/df5df339-4305-4e33-8ad0-a753808defda/82804828771.pdfIn PDF document text
- https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_4c46e022b4e24b0c8236d54a8aff2bed.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00011e4a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E4A	5320 bytes
SHA-256: `5f4d4d2bc0a14efc0ac50be2eca32edb05dd53c2413418b54a72061b029b32fa`
`font_01_sfnt_off00013079.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13079	11808 bytes
SHA-256: `ea79443d6ae1cbbd4e7def2f89ced01a5e59582a9fbc6bb0106f20688cfc2556`
`font_02_sfnt_off00015889.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15889	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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