PDF malware analysis — malicious · 6ccd79a01ae419fe

MALICIOUS

PDF

76.6 KB Created: 2021-03-09 19:37:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02

MD5: 6c8ca58799f4a502ed0a307e57b2f65e SHA-1: 1edaf0c51c8dc6ca3f5a6ed3d5bd0dff0aa2a3a8 SHA-256: 6ccd79a01ae419fe2fdfde6f43da8b11048244c1cc149aa8ff43ce629e1ccc74

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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 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://pelibifir.ru/aws?utm_term=dmrc+psycho+test+book+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4375077/normal_602a4c36be40c.pdfIn PDF document text
- http://lebedugipul.mywebcommunity.org/how_do_i_add_a_camera_to_my_summer_infant_monitor.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4484115/normal_5ff6c5fa86ff7.pdfIn PDF document text
- http://jawixogu.mygamesonline.org/gorasumafavub.pdfIn PDF document text
- http://websporizle3.com/59265534527duk4a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476751/normal_603bb920abe0c.pdfIn PDF document text
- http://lunagogafoxoj.sportsontheweb.net/rose_petit_prince_symbolique.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4421042/normal_5fcc9a914f8f8.pdfIn PDF document text
- http://junumidutuzakox.getenjoyment.net/how_to_set_time_on_woods_indoor_timer.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4480580/normal_5fe50ee40d2a8.pdfIn PDF document text
- http://gejudoxe.mypressonline.com/labibexolabapukuwazipom.pdfIn PDF document text
- http://natbeach.space/xutalupulimim5kfpd.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4465919/normal_600405f904962.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4418000/normal_5feecf0546706.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- https://s3.amazonaws.com/tarizirefevifab/simple_pursuit_piano_sheet_music.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/51801bbc-f798-4cf7-a545-ffc2e8c4f874/missing_angles_in_polygons_worksheet.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cb4a3ca2-cd11-4103-a8e1-a85656c45a5b/2012_jeep_grand_cherokee_battery_replacement.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fd105cb9-286b-4ed2-9390-89f312da945e/unitypoint_express_clinic_west_des_moines.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/88f24396-036c-446a-982e-d423cac39a30/89160620071.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4d212133-c300-4395-ae2a-f62c64768290/tiwolup.pdfIn PDF document text
- https://s3.amazonaws.com/natewared/batman_arkham_origins_pc_blackbox.pdfIn PDF document text
- https://s3.amazonaws.com/rotowan/ibps_calendar_2019-_20.pdfIn PDF document text
- https://s3.amazonaws.com/vofadoloves/moviescounter._com_free.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_off0000e091.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE091	5456 bytes
SHA-256: `80b48c58a31822972cd5abba9f38fc6a1e8a1f3dc969bdb187f9c35b680d69e8`
`font_01_sfnt_off0000f2fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2FE	11056 bytes
SHA-256: `1b5b46d44d5cada8f2883093816f5ece38992a568a557c17493054e25332726a`
`font_02_sfnt_off000118f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118F0	3124 bytes
SHA-256: `50ca685c77fcaab7e22eb9c54a2d5ab4757bf10d23da4bb09ab9df98e9a96d24`

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