PDF malware analysis — malicious · 4f827546c5336da5

MALICIOUS

PDF

86.8 KB Created: 2021-03-25 07:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28

MD5: 72f3b96016cb5ddc3c2488334139f2ac SHA-1: 8ee40b3b789dc51f396d52093b01711c451c3555 SHA-256: 4f827546c5336da53b4380d61eea1839f08df74bade553696ec690ed041f3cad

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple external links, with one prominent URL leading to a domain associated with malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. The document body's content, though partially obfuscated, references 'Vanity fair movie reese witherspoon' and includes wkhtmltopdf metadata, suggesting a lure to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://bologen.ru/strik?utm_term=vanity+fair+movie+reese+witherspoon PDF link annotation
- http://nozekem.iblogger.org/antimicoticos_clasificacion.pdfIn PDF document text
- https://cdn.sqhk.co/woselukafo/ghjjSie/survival_film_planet_der_affen.pdfIn PDF document text
- https://tixanesel.weebly.com/uploads/1/3/4/2/134234664/5220569.pdfIn PDF document text
- https://nudesobaxoxis.weebly.com/uploads/1/3/4/6/134666739/82a31cb18b.pdfIn PDF document text
- https://cdn.sqhk.co/tejurorado/hehiibx/16045464456.pdfIn PDF document text
- https://cdn.sqhk.co/bamazaludez/bI1ijgc/zombie_wallpaper_iphone_6s_hd.pdfIn PDF document text
- https://cdn.sqhk.co/vumorumuvogi/ZHcDjg0/mountain_climbers_axe.pdfIn PDF document text
- https://cdn.sqhk.co/bumogebiz/ehciggi/88929896400.pdfIn PDF document text
- https://rusokupos.weebly.com/uploads/1/3/4/4/134468665/135006.pdfIn PDF document text
- https://senaduwofajix.weebly.com/uploads/1/3/0/7/130775021/kiwowa-vomof-mibutoti-joregigexipade.pdfIn PDF document text
- http://vawavapoguridu.iblogger.org/approval_sheet_example_in_research_paper.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://bajefeluxit.rf.gd/38563860984.pdfIn PDF document text
- https://s3.amazonaws.com/xukonakefules/imo_incoming_call_ringtone_free.pdfIn PDF document text
- https://s3.amazonaws.com/nuselufuzo/beautiful_flowers_images_in_hd.pdfIn PDF document text
- https://s3.amazonaws.com/bitajemisajoz/dialectical_behavior_therapy_techniques.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ef3e1050-5ac7-4180-b190-7ba487e05f9f/letra_del_himno_nacional_mexicano_en_nahuatl_de_zongolica.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5ba11307-75e0-48c8-8c37-0a2437b31851/california_real_estate_final_walk_through_form.pdfIn PDF document text
- https://s3.amazonaws.com/vuxalirudidel/how_to_cook_turkey_in_oil_less_fryer.pdfIn PDF document text
- http://pikawin.rf.gd/40501937849.pdfIn PDF document text
- https://s3.amazonaws.com/kizugokofo/algorithmic_game_theory_nisan.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c26c7db4-71ca-4256-95eb-e5b30ea27aea/30652652184.pdfIn PDF document text
- https://s3.amazonaws.com/pogolo/whirlpool_quiet_partner_1_filter.pdfIn PDF document text
- https://s3.amazonaws.com/zetituri/bpt_intercom_software.pdfIn PDF document text
- https://s3.amazonaws.com/nokiva/16861262499.pdfIn PDF document text
- http://bupulifiso.rf.gd/franz_kafka_metamorphosis_meaning.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_off00010248.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10248	6588 bytes
SHA-256: `b3260a8b27c40a1c9408c40b3dcfb9ec9ded560232013cbc1ca8de37ebb5a831`
`font_01_sfnt_off000112c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112C2	5328 bytes
SHA-256: `633da63c3712cd9feaabaca2003034af97ce316d6dca9e61ae03f1f2ebe8e43d`
`font_02_sfnt_off000124db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124DB	11976 bytes
SHA-256: `bed97e0267d1b1b43de788aa44d2b02f0b21d03e0edf4ec94cc9084560fa591d`

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