PDF malware analysis — malicious · 855b1977c1b8e8b3

MALICIOUS

PDF

88.9 KB Created: 2020-11-10 04:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 227ce9124277c4254fdbb16c51535333 SHA-1: d3ba11137d6208700d5f66517ad8cb2f2735e86e SHA-256: 855b1977c1b8e8b3c6834fdaa70c68859e7df6c70c80667aa92df8223f5ae183

214 Risk Score

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 0.9996

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/123?keyword=sandra+latina+pinterest In PDF document text
- https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdfIn PDF document text
- https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/729ad225.pdfIn PDF document text
- https://komavumi.weebly.com/uploads/1/3/0/7/130738531/rabibom_lixopukakiwa_liraja.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/82d5bc9a-dfec-4b88-bb7e-733b1d0f5e9c/99042956039.pdfIn PDF document text
- https://s3.amazonaws.com/kakekojezutok/texas_law_pocket_guide.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b31eeb2c-3a3b-4978-a67b-3bdf2dfe64c4/charles_law_lab_report_answers.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fdd1d879-bf0e-4005-9c33-6aaf9dd85081/13210586985.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e2c3eb05-0c5c-466f-a955-bfe3000de969/drop_deadline_ucsd_summer.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/18ae67c8-5ba0-4d74-ac0e-4eebc1c0a7c3/fojubiwezatogini.pdfIn PDF document text
- https://s3.amazonaws.com/bevarolimesale/number_of_occurrences_meaning.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/27889821-55eb-4227-9716-1a28ab1b7f3c/toys_pop_pop_pets.pdfIn PDF document text
- https://s3.amazonaws.com/gazitif/nonadevotupunar.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7c61edae-01b0-4128-b87b-522b2d6f08b0/modern_physical_organic_chemistry_anslyn_free_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9785fa22-8cc4-43c1-8266-3fdcdc9ced84/17600334427.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f01f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF01F	5056 bytes
SHA-256: `fb51476f80f9a776c9fe5f608130b89f7222f525a15ccd37e6cd10ff37519d45`
`font_01_sfnt_off0001014f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1014F	8436 bytes
SHA-256: `10fc2bf332bf85b6271ae1ed4fb017c624fc4d5dc99aa950a8a33e1eff332357`
`font_02_sfnt_off000119b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119B2	11944 bytes
SHA-256: `026a03bf9f4f97c8a88f49da04df788678c7c77940ce182ecac5e61524758355`
`font_03_sfnt_off0001410e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1410E	16168 bytes
SHA-256: `794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8`

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