PDF malware analysis — malicious · a2111b0a8403dffc

MALICIOUS

PDF

75.5 KB Created: 2021-03-24 02:43:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: c54da51d4fab75f8a59f7b8eaec44fe9 SHA-1: 605732be8b480cf809716c3e40bad3451c47987f SHA-256: a2111b0a8403dffc68a91c0c0435bbaf76e36e0caed72f8e21676b992e8b8513

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure and potentially malicious websites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the document is designed to funnel users to malicious sites, likely for phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://yafferge.ru/wix?keyword=gun+mayhem+4+unblocked+weebly In PDF document text
- https://nabujoxosujegim.weebly.com/uploads/1/3/5/9/135958809/584c1b3982d12.pdfIn PDF document text
- https://vizexetu.weebly.com/uploads/1/3/4/8/134864552/9097078.pdfIn PDF document text
- https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/sodupebufalopesel.pdfIn PDF document text
- https://linikakisevokeg.weebly.com/uploads/1/3/6/0/136098208/1eae9.pdfIn PDF document text
- https://mosejibufo.weebly.com/uploads/1/3/4/4/134437632/c6079.pdfIn PDF document text
- http://guitar.su/rock_choir_music_sheetft103.pdfIn PDF document text
- https://cdn.sqhk.co/pilozarager/cjeifha/alkaline_trio_crimson.pdfIn PDF document text
- http://triple-doska1.club/vebategarekabiloru61bf8.pdfIn PDF document text
- https://cdn.sqhk.co/wifuponi/jZE3bLE/gps_speedometer_app_accuracy.pdfIn PDF document text
- http://feldhaus-klinker-plitka.ru/68914794558e2lh4.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/lezerawe/35991631410.pdfIn PDF document text
- https://s3.amazonaws.com/dewazewokib/68877788369.pdfIn PDF document text
- https://4b98dde3-f65d-4e11-807b-d4501949e87b.filesusr.com/ugd/4a7ebd_23b89dc248014d20ad4e0716fbb2b3eb.pdf?index=trueIn PDF document text
- https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_14645ab9f1734eaa9c429cfa0d599124.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/dazifozixawus/63337848957.pdfIn PDF document text
- https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_531b79867d374c8ea8d4df3799c6d0bd.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vezumobigodub/king_arthur_brownie_bowl_pan_recipes.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/817f2a94-0c4b-4dab-9f83-5aa42d95cb1f/whirlpool_bottom_load_water_dispenser_cold_water_not_working.pdfIn PDF document text
- https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_589088c16b274c429255b4b39765f804.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/5f4046ac-860d-47c0-baf2-1683a03de69d/kitchenaid_superba_dishwasher_troubleshooting.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0cf65027-19cd-4e50-a2c5-2de127b2d8f2/stihl_sh_86_c-e_vacuum_shredder_price.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_off0000d8f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8F9	6744 bytes
SHA-256: `048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4`
`font_01_sfnt_off0000e9de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9DE	5420 bytes
SHA-256: `f9bf46f40e78919e00f87b571db4afb979c1b066c89b370acce177d53757cfc5`
`font_02_sfnt_off0000fc47.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC47	10476 bytes
SHA-256: `bad7eaf7dd51f9dfc76d0bebaa48c6ad8f67276bf427e6aaa9222e9d3cf3f00d`

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