PDF malware analysis — malicious · 003d0da4f38e2db3

MALICIOUS

PDF

81.6 KB Created: 2021-06-14 08:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 3be17891dd32f0b6b4d488feb481ef52 SHA-1: 40b24c83b432708650f20658a696648eaf80f7eb SHA-256: 003d0da4f38e2db3f238484503a26ffdddf714d38a5460fad30431cb3b6d310e

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

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.
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://infrive.ru/pbw?utm_term=mp+todaro+economic+development+pdf PDF link annotation
- https://moleresudiba.weebly.com/uploads/1/3/4/4/134447347/e56efd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410013/normal_60c4fdbc4f107.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379723/normal_60c4e7a57cafe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4445869/normal_604b961335d3f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4494868/normal_5fd923a0b1915.pdfIn PDF document text
- https://larulevi.weebly.com/uploads/1/3/6/0/136004384/rinizanuduniram_naluvumujoxoku_lovirop_nadopijusoz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392660/normal_606ac3378c571.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4487622/normal_603a41a82be13.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4447877/normal_5fe29742180dd.pdfIn PDF document text
- https://lonopenofof.weebly.com/uploads/1/3/4/8/134895818/687c2b57.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466153/normal_604476b611a67.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://tujedet.pbworks.com/w/file/fetch/144550146/navabo.pdfIn PDF document text
- http://zewalar.pbworks.com/w/file/fetch/144463638/how_to_program_a_viper_alarm_remote_control.pdfIn PDF document text
- http://gonikob.pbworks.com/f/grand_theft_auto_v_mod_apk_android_1.pdfIn PDF document text
- http://xudusuvo.pbworks.com/w/file/fetch/145084704/kettlebell_exercises_for_forearms.pdfIn PDF document text
- http://kipizasuzeda.pbworks.com/w/file/fetch/144737730/87107239199.pdfIn PDF document text
- http://wasazejis.pbworks.com/w/file/fetch/144603900/the_kissing_booth_noah_and_elle_height_difference.pdfIn PDF document text
- http://mosutit.pbworks.com/f/94844360032.pdfIn PDF document text
- http://jojuzoxox.pbworks.com/w/file/fetch/145218315/boboiboy_movie_2_full_download.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_off0000f47c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF47C	4976 bytes
SHA-256: `cafa36e91af18221af677d5206530df8ff58cd9af59c07b50b5c3efe6f334672`
`font_01_sfnt_off0001055a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1055A	11160 bytes
SHA-256: `a5f3d9de63b08b1859d962330e1bf055a3ac4bf21ba450a8b86a5e21e1efb532`
`font_02_sfnt_off00012b3e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B3E	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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