PDF malware analysis — malicious · 687230d76c6deb01

MALICIOUS

PDF

83.2 KB Created: 2021-03-24 12:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 5c0edb508604b2de38303ad6d7d3ce36 SHA-1: c6e3e4831b06cd35b8fece1f0f06969113c01ebe SHA-256: 687230d76c6deb01e9c5169b08f45eb2db87a41d449bd96a91ab82be12ca6f17

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and 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 0.9967

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://xezojetit.ru/award?keyword=affairs+cloud+august+2020+pdf+download PDF link annotation
- https://cdn-cms.f-static.net/uploads/4369911/normal_6021ea8caa29e.pdfIn PDF document text
- https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/dijatadadotane.pdfIn PDF document text
- https://fubewewafipox.weebly.com/uploads/1/3/0/8/130874235/fezuz.pdfIn PDF document text
- https://zixavuxo.weebly.com/uploads/1/3/1/3/131398386/f6df5f1ae46b8fe.pdfIn PDF document text
- https://toxozuduz.weebly.com/uploads/1/3/5/2/135295771/vofutoril-pebepezobosoted.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4501975/normal_5fe5526c275d1.pdfIn PDF document text
- https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/movigeruwi-wesema-wageloruniga.pdfIn PDF document text
- https://puneliten.weebly.com/uploads/1/3/4/0/134040782/zaloparaxa_raditew.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388173/normal_5fd9fba288504.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378153/normal_6035179ebab15.pdfIn PDF document text
- https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/319b867a2fa83.pdfIn PDF document text
- https://mobinefoju.weebly.com/uploads/1/3/1/3/131398425/wabomoku.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4387424/normal_5ff5963094d2e.pdfIn PDF document text
- https://dagagiketilijo.weebly.com/uploads/1/3/4/3/134312633/7ecb675.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/1de43808-2cd3-4eff-ae73-2060813189ff/braun_340s-4_head.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8a5bdb1b-19e2-4719-bddd-b13353b4bef0/how_to_change_battery_ti_ba_ii_plus_professional.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/876e40cd-6b2e-40e5-8cb0-7c8349a3f515/foscam_fi9900p_v4_firmware.pdfIn PDF document text
- https://s3.amazonaws.com/tonemakopinibem/wiperufadosigi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/edd682b3-27c1-4ab6-927f-f72c2a75ea33/35241282216.pdfIn PDF document text
- https://s3.amazonaws.com/lewuli/can_you_build_houses_while_in_jail_monopoly.pdfIn PDF document text
- https://s3.amazonaws.com/tarizirefevifab/tsc_maternity_leave_form_kenya.pdfIn PDF document text
- https://s3.amazonaws.com/dusined/online_form_of_sainik_school.pdfIn PDF document text
- https://s3.amazonaws.com/fajujiju/calligraphy_free_ebook_download_sites.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/500b561e-36bd-4365-84bf-b69192a4ff03/82049345778.pdfIn PDF document text
- https://s3.amazonaws.com/jolozidabi/ingersoll_rand_compressor_oil_change.pdfIn PDF document text
- https://s3.amazonaws.com/dupula/where_can_i_buy_a_us_craftmaster_water_heater.pdfIn PDF document text
- https://s3.amazonaws.com/tugumeb/html_attributes_list_bangla.pdfIn PDF document text
- https://s3.amazonaws.com/lejivugeleguwod/transformers_bumblebee_pajamas_4t.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000103d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103D3	5680 bytes
SHA-256: `59a6acb98b9b1297f1354bf6baecfd5e8d6b45160062a0e434e36fb79a7e8e04`
`font_01_sfnt_off0001174f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1174F	11612 bytes
SHA-256: `0767b7548866950dc289951e670e7acf6ff55dc3ff0c319e7119d65dfc1e31ed`

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