PDF malware analysis — malicious · 4529849e5e1d3406

MALICIOUS

PDF

82.7 KB Created: 2021-05-24 19:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 4ef40d1992dc14ed752b6f3cf7d83e92 SHA-1: 2261e969c209bbdd926edd93d9febd9a4d896270 SHA-256: 4529849e5e1d3406224041e4b10051b67cc623ff36a1a32843bb3eea88994020

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one pointing to a suspicious URL that appears to be a lure for downloading a game. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be part of a multi-stage attack involving encrypted payloads. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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 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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://xajibur.ru/strik?utm_term=fnaf+ultimate+custom+night+free+download+for+pc PDF link annotation
- https://vadugoza.weebly.com/uploads/1/3/4/5/134599956/zepazid_rixuw_xezin_fuzotatabibu.pdfIn PDF document text
- https://xuzipitazejaj.weebly.com/uploads/1/3/4/7/134722028/5037430.pdfIn PDF document text
- https://zoluwapipapak.weebly.com/uploads/1/3/5/3/135321816/femok.pdfIn PDF document text
- https://labimatejodo.weebly.com/uploads/1/3/2/3/132302966/7498746e2aae.pdfIn PDF document text
- https://derugipuze.weebly.com/uploads/1/3/0/8/130814861/mezoniz_lenuguzatep_mikodemakan_midozusuligor.pdfIn PDF document text
- https://ketodoligas.weebly.com/uploads/1/3/4/3/134384615/513526cc43e7.pdfIn PDF document text
- https://kekuxepepave.weebly.com/uploads/1/3/0/7/130739312/20868f3.pdfIn PDF document text
- https://pakipuxis.weebly.com/uploads/1/3/5/3/135347710/b82c129ad.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/jedadokuti/lumoraxurijabizeg.pdfIn PDF document text
- https://s3.amazonaws.com/toguvaju/jujilotezijifinun.pdfIn PDF document text
- https://s3.amazonaws.com/xozeb/order_to_play_fallout_4_dlc.pdfIn PDF document text
- https://s3.amazonaws.com/ladiwuzetawedi/94778453184.pdfIn PDF document text
- https://s3.amazonaws.com/mukut/anchor_hillsong_chords.pdfIn PDF document text
- https://s3.amazonaws.com/gudukupir/apeman_action_camera_app_android.pdfIn PDF document text
- https://s3.amazonaws.com/tubukeganuji/61357465425.pdfIn PDF document text
- https://s3.amazonaws.com/pajeriramal/pidegu.pdfIn PDF document text
- https://s3.amazonaws.com/bejeseja/aids_causes_and_prevention.pdfIn PDF document text
- https://s3.amazonaws.com/jadudusujuje/harland_crafting_guide.pdfIn PDF document text
- https://s3.amazonaws.com/watajive/hunchback_of_notre_dame_book_summary.pdfIn PDF document text
- https://s3.amazonaws.com/dezajok/34969699390.pdfIn PDF document text
- https://s3.amazonaws.com/loneminovu/tableaux_de_provence_alto_sax.pdfIn PDF document text
- https://s3.amazonaws.com/rodiligarexo/crossfit_training_with_weight_vest.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000f418.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF418	6440 bytes
SHA-256: `a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c`
`font_01_sfnt_off0001040c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1040C	5616 bytes
SHA-256: `7884c835dcac9f20a40de46d24785beca9becb018a57a869ca73f7597fbdf629`
`font_02_sfnt_off00011715.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11715	11016 bytes
SHA-256: `6356148522c39636198e9ce61e22f6c6fa7f552f0e76d38f5c82d7c709eab7f5`

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