PDF malware analysis — malicious · 02b3dbd83040f4a4

MALICIOUS

PDF

82.6 KB Created: 2021-05-28 03:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 8ecb1eee6a938dfcaf139d3441e61e2b SHA-1: c61f0a6efc246fdb128c3b05f6cfe4583ccf3fe4 SHA-256: 02b3dbd83040f4a419eae312478a98eb74c3a02586d43ecfd16734098ca28762

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. The document body, though truncated, references a TV show title, which is likely a lure to entice users to click the embedded links.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://zajinet.ru/strik?utm_term=la+se%25C3%25B1ora+fazilet+y+sus+hijas+en+espa%25C3%25B1ol+capitulo+50 PDF link annotation
- https://cdn-cms.f-static.net/uploads/4491410/normal_6060c240dfacb.pdfIn PDF document text
- https://vajugape.weebly.com/uploads/1/3/4/7/134767319/salivarujipam-jikadezuwunevib.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387226/normal_60416581f414a.pdfIn PDF document text
- https://vexigijetizi.weebly.com/uploads/1/3/4/7/134771524/4757931.pdfIn PDF document text
- https://xefufisemir.weebly.com/uploads/1/3/5/3/135393588/3897043.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4463803/normal_60460d2c4040b.pdfIn PDF document text
- https://rudazijix.weebly.com/uploads/1/3/1/4/131453676/121948.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389097/normal_604d182e4425d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471960/normal_6050c824470b5.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/b230933c-3b55-4535-a17d-23ca9eb89878/miwovezafupezaz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1a02d442-509e-4b7a-ad46-589feb1d6c96/monster_problems_2020_trailer.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b8b21bc1-656a-4c34-9952-bf918d3bd417/how_to_use_midi_keyboard_with_ableton_live_9.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/431e8b86-2a2b-4e7c-91ac-ee9e67f3cb8b/xofedesuxexirof.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6929ba4b-b394-4414-b809-a3be2eef6dfe/libavudekejesedonijepufo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0221a458-124a-472f-b1d6-d5f4ac37f675/basomizanipanodavonit.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/03d8d903-1724-4d78-91bb-42baef8be9dc/gosabiri.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8662e804-7622-4440-bf3b-a25d260625fe/28994157543.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/72d18213-60b9-4a08-87f9-b4219d93f76c/85273452572.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/935fc201-b96a-4f12-8829-8bf23c228126/sefapedepim.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c8ca0fb7-5228-4798-9409-a8671be1b028/kavesuvovejinalebinipikon.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/40c437fe-3c97-4979-814b-673d2b0a2568/51187109237.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5d028aed-1ff7-4f6d-9946-80fecf388278/what_is_a_base_rate_in_psychology.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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
`stream_004_off00011f5c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x11F5C	17616 bytes
SHA-256: `ee4109fbe6d4df9231e884ac1eb6eb76a30d38f67cd6d54497a541ace3961509`
`font_00_sfnt_off0000e3e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3E1	5752 bytes
SHA-256: `e3f1b23f714ab9e3a4efbf1a5033d1d4ca7f801bebb48b3b7ec8c79d3ab3eacb`
`font_01_sfnt_off0000f740.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF740	13644 bytes
SHA-256: `f8752a7b57c429082c3a42bce1148f230c8f2d7d53000f9c2b8254293b3ed220`

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