PDF malware analysis — malicious · e463c4e99f8866c9

MALICIOUS

PDF

80.0 KB Created: 2021-04-28 02:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: 276b1e917dc05de91a88a39f6ff8f046 SHA-1: b7f7563c6bfbed36db860bb13bab55eb15aa9342 SHA-256: e463c4e99f8866c96a44794c1ce2204b468034ec8fc6681e762135660d1d5cee

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.9415

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.
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
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=principales+caracteristicas+de+un+motor+de+corriente+continua PDF link annotation
- http://jadebey-x.com/fly_einaudi_sheet_music_freeg6329.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460247/normal_605f5da159587.pdfIn PDF document text
- https://gapotijaj.weebly.com/uploads/1/3/1/3/131383657/supefudawi.pdfIn PDF document text
- http://raisinsapp.club/android_available_timezonesz3bzx.pdfIn PDF document text
- http://agentsoft.space/elphelt_guide_rev_2y0gqe.pdfIn PDF document text
- http://ru-1.casa/xuguronobix3ijdw.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4473379/normal_6026f6e5b5aca.pdfIn PDF document text
- http://polypak.site/jukazi4yibv.pdfIn PDF document text
- http://shopsupergood.site/modo_congiuntivo_condizionale_e_imperativotezar.pdfIn PDF document text
- https://sujanumijixedi.weebly.com/uploads/1/3/4/5/134501714/a1caed.pdfIn PDF document text
- https://wefigoga.weebly.com/uploads/1/3/4/0/134041661/mobav-xamifine-movunekotovire.pdfIn PDF document text
- http://topchambre.xyz/rowosirs7z.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/c67ed7c8-e673-4603-b609-737a438614bf/40290691056.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6619295a-e141-43a9-8ce6-f44776eeee13/couch_to_5k_treadmill_plan.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4f8a8ec8-0f89-4a68-9117-330235ca392c/81777245070.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e924eb50-9972-49dd-b08d-46840530dd2e/lanabunimedeputevotanufiv.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a84608d1-ff97-4cd3-acd3-a6174a113b68/deskjet_2542_scanner.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a5ed9170-ea4a-4df5-9daf-759346c9b3cc/how_to_replace_a_directv_genie_mini.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f1d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1D5	5220 bytes
SHA-256: `a729c545acdd727ec08e7343d0ced3f7bd5510a6deaa1ef467eca226ed48d8b9`
`font_01_sfnt_off0001037d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1037D	12668 bytes
SHA-256: `9b4c1782a07820a86a8f890441750c2555ef22f530261ab9e7a4367b50ac44f3`
`font_02_sfnt_off00012ce3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12CE3	16064 bytes
SHA-256: `d7bba43471984fde62ee25506053f4468e5348dda9e6b0ee5126d021e3aea99f`

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