PDF malware analysis — malicious · 4436bfbf88944416

MALICIOUS

PDF

85.5 KB Created: 2021-04-26 01:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: a404ad083795e364d8da09659e66ebe0 SHA-1: 1f60b2a74601bb59c9b05a11bfe9385bd08a5da3 SHA-256: 4436bfbf889444164d391492537b38abd846f5f6c0bc8834cfb4cc52b5adcd9d

66 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 0.9919

Heuristics 4

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.
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://crophysi.ru/strik?utm_term=attack+on+titan+movie+live+action+cast PDF link annotation
- https://cdn-cms.f-static.net/uploads/4467915/normal_6059c690c561a.pdfIn PDF document text
- https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/c17902f68.pdfIn PDF document text
- https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/gozijera_xekamopokupikuk.pdfIn PDF document text
- http://terakusinuw.mypressonline.com/18444647152.pdfIn PDF document text
- http://wegutamozeji.iblogger.org/nolutuvusikedidudavu.pdfIn PDF document text
- https://balebapu.weebly.com/uploads/1/3/5/3/135322653/moxukema.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4402262/normal_5ffba036811df.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460944/normal_6012839774f06.pdfIn PDF document text
- http://nabavawuzafurur.mygamesonline.org/28016432386.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475571/normal_5fd378a7a70db.pdfIn PDF document text
- http://discout.online/55969699886ugadw.pdfIn PDF document text
- https://zuxivojeduzudog.weebly.com/uploads/1/3/1/3/131381782/jadararojip.pdfIn PDF document text
- http://domastmsk.space/vector_spherical_harmonics_matlabjm0su.pdfIn PDF document text
- http://ecoterritory.store/gesebavamanodeferuvox9bd2.pdfIn PDF document text
- http://zefujixa.mywebcommunity.org/tomugenobumamivuponemazon.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366655/normal_603dc8fa10bd4.pdfIn PDF document text
- http://tevutubiwij.getenjoyment.net/cards_against_humanity_cards.pdfIn PDF document text
- https://kozitasulama.weebly.com/uploads/1/3/4/6/134647404/6110125.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.opentle.orgIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://wozilololigib.epizy.com/durham_region_recycling_guide.pdfIn PDF document text
- http://sidogin.epizy.com/fasex.pdfIn PDF document text
- http://zetitovafe.rf.gd/27538221265.pdfIn PDF document text
- http://leribilif.rf.gd/non_probability_sampling.pdfIn PDF document text
- http://rajuxibusajebob.rf.gd/best_bulking_program.pdfIn PDF document text
- http://mimewimirul.rf.gd/kugolib.pdfIn PDF document text
- http://tiwedozesa.atwebpages.com/birth_asphyxia.pdfIn PDF document text
- http://mexaxezixolo.rf.gd/bangaru_babu_video_songs.pdfIn PDF document text
- http://dudanijop.rf.gd/87832527333.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f4a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4A0	4748 bytes
SHA-256: `7823f6dd282fc7f751e772dbc33cbe28504f4e232130feaba412524013a92572`
`font_01_sfnt_off0001049f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1049F	6148 bytes
SHA-256: `4910d0177da9f60ecc92c13a34fae8c5c38ffafb9e4e22a3c3fd987548b79157`
`font_02_sfnt_off00011480.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11480	10888 bytes
SHA-256: `bcc2e9872f954bc51d05ce96187dd45f3fd9aa395dac9f401dff57ec9b457ab9`
`font_03_sfnt_off00013998.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13998	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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