PDF malware analysis — malicious · 21da5cd02099a7e0

MALICIOUS

PDF

82.9 KB Created: 2021-05-26 04:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 4dfe0d574ff3a14c2065ec0f8cdff3d1 SHA-1: 191ffbcb866e63401f6413b7ecba56b38056f384 SHA-256: 21da5cd02099a7e0198ec16010e5d95db477114d488e3e5a14fdf68e28717312

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a phishing or content-serving attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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
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://leonvi.ru/strik?utm_term=japanese+the+spoken+language+part+1+pdf PDF link annotation
- https://barijimuje.weebly.com/uploads/1/3/1/4/131406344/zoduxojikorivaxas.pdfIn PDF document text
- https://wopopodixela.weebly.com/uploads/1/3/0/9/130969383/98b03a4504a.pdfIn PDF document text
- https://mirexoxufi.weebly.com/uploads/1/3/0/9/130969656/71e661622731.pdfIn PDF document text
- https://vudewozojaw.weebly.com/uploads/1/3/6/0/136053158/kudopibobo.pdfIn PDF document text
- https://zewerigavuj.weebly.com/uploads/1/3/2/6/132681779/5881338.pdfIn PDF document text
- https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/3163245.pdfIn PDF document text
- https://tugokuwotim.weebly.com/uploads/1/3/1/3/131379049/3391367.pdfIn PDF document text
- https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/50abe3916.pdfIn PDF document text
- https://vufufibujirefe.weebly.com/uploads/1/3/4/3/134355905/xesuk.pdfIn PDF document text
- https://povewagefafede.weebly.com/uploads/1/3/4/8/134888055/01b6749f92513f.pdfIn PDF document text
- https://bejelasinodajib.weebly.com/uploads/1/3/4/7/134764461/gubigomi.pdfIn PDF document text
- https://burekanokem.weebly.com/uploads/1/3/1/0/131069897/b1760bf3ce.pdfIn PDF document text
- https://tuxipowu.weebly.com/uploads/1/3/4/6/134699968/c879a61f976e.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/jepinebawo/fedex_customer_service_file_a_complaint.pdfIn PDF document text
- https://s3.amazonaws.com/pibabopuduj/cg_dj_syk_all_song_2019.pdfIn PDF document text
- https://s3.amazonaws.com/rorives/bluewin_mail_login_android.pdfIn PDF document text
- https://s3.amazonaws.com/livivuvuwugeb/tobinejabimamedafuv.pdfIn PDF document text
- https://s3.amazonaws.com/bubeto/ssc_admit_card_2019_delhi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c97d6722-7b5b-4393-a850-55a7a19cd9d0/tecumseh_carburetor_rebuild_kit_near_me.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5524ca1e-a19d-4591-b759-c6dbbaa1b718/audacity_para_linux_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ba934bfc-f56a-471b-8b6e-0484112d2bdd/big_little_lies_season_2_recap_episode_1.pdfIn PDF document text
- https://s3.amazonaws.com/dejazuvorira/how_to_remove_old_deep_acne_scars.pdfIn PDF document text
- https://s3.amazonaws.com/lopadivupudexa/why_didnt_they_make_the_lost_symbol_movie.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f2fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2FA	4776 bytes
SHA-256: `2d4f380aea2633c7a5da3834fa8dc40b52b0bac6c92f944bf6407a53206abb1c`
`font_01_sfnt_off000103bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103BF	5408 bytes
SHA-256: `027d829003b0e201ce43c010fe78addf774083eae39d9ebca4be6aed8d1bf099`
`font_02_sfnt_off00011623.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11623	11512 bytes
SHA-256: `10c8f64228b372382fa57d1db44cd4dee437d6db41082999ae1e1926ca0b70a5`

Open this report in the interactive analyzer, or submit your own file for analysis.