PDF malware analysis — malicious · 380b04959bcc6a37

MALICIOUS

PDF

90.1 KB Created: 2021-03-11 04:33:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: b5f2a6e971053de3932c06e00fd2e7d8 SHA-1: 1709e0a92683ff67777feab01625f9770d810a63 SHA-256: 380b04959bcc6a372adf1099246b5d328d7b60cd0ae4ad70665f18aa312e29ef

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by 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 0.9951

Heuristics 4

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://xezojetit.ru/123?utm_term=best+free+weight+lifting+apps+for+android PDF link annotation
- https://piziwola.weebly.com/uploads/1/3/1/3/131382430/ripatimafonofu.pdfIn PDF document text
- https://sagerogokijisoj.weebly.com/uploads/1/3/4/6/134601402/wizopiforenu.pdfIn PDF document text
- https://tivuwamivubi.weebly.com/uploads/1/3/5/3/135384825/9370997.pdfIn PDF document text
- http://fajamad.mypressonline.com/xafunububevi.pdfIn PDF document text
- https://biteledazuxol.weebly.com/uploads/1/3/4/3/134315761/91560f.pdfIn PDF document text
- https://gamidamivagug.weebly.com/uploads/1/3/5/3/135324690/kofotomizedidom.pdfIn PDF document text
- http://wovuwukotuvoxi.mygamesonline.org/strength_training_exercises.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/1eb9a5af-29b1-41f2-9902-06c152289d55/lodibubosefu.pdfIn PDF document text
- https://s3.amazonaws.com/xufaxoferugod/blender_3d_gratis_italiano.pdfIn PDF document text
- https://s3.amazonaws.com/viregujipowuru/bike_rider_images_hd.pdfIn PDF document text
- https://s3.amazonaws.com/sojebelevenex/smd_capacitor_size_guide.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9fd85579-6a6e-4f68-bf38-121b0eee97aa/resudetupafejeforopotu.pdfIn PDF document text
- https://s3.amazonaws.com/kiwopusafize/16879409761.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/de97d7ba-09f5-4aab-934e-1bcb832e3adf/best_plugins_for_fl_studio_trap.pdfIn PDF document text
- https://s3.amazonaws.com/gizonukorad/aluminium_sheet_plate_perth.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3322db4c-4255-474a-af94-cae5c33453d1/xufipoxojabujadevepewo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/685a2992-e755-4bdf-8425-e88258329642/7801902365.pdfIn PDF document text
- https://s3.amazonaws.com/nodetuxapabara/82426915858.pdfIn PDF document text
- https://s3.amazonaws.com/wovugi/petivababo.pdfIn PDF document text
- https://s3.amazonaws.com/rozebofukixus/1058622235.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e14a5565-318b-46d1-a928-264b7c501dd8/xudowetogujekadowovi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/71920347-0ad1-453c-86f7-c7ee4833fb90/wing_chun_film_online.pdfIn PDF document text
- https://s3.amazonaws.com/gumagabu/write_report_commentary.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/54b20621-8eae-415e-a22b-1537cd529055/7885943121.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/37af0b9e-6b5b-4a58-8345-bce16b351d86/what_colors_does_red_and_purple_make.pdfIn PDF document text
- https://s3.amazonaws.com/varoximu/cell_stephen_king_full_movie.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/820a770f-9874-432d-98f3-6ccf4c9c74dd/dd_essentials_rulebook.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_off0001107b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1107B	6440 bytes
SHA-256: `2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb`
`font_01_sfnt_off00012070.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12070	5444 bytes
SHA-256: `1bba69939ed10ad092b5018f1e8a93eee700b748acd7d023ad9681f4ab97a53f`
`font_02_sfnt_off00013309.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13309	11480 bytes
SHA-256: `a8c69a4aa64f54a7f6d2511923f4899b7c65811263cbdbabb852b23bce1f8c62`

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