PDF malware analysis — malicious · 904fd2fc23824def

MALICIOUS

PDF

83.1 KB Created: 2021-05-22 07:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: bb9d632f0e86dd256a9492c20fa20607 SHA-1: 053d2a78a5c1633394ac17b6bfa690715b2c4c41 SHA-256: 904fd2fc23824deffb980c56c1f1e03434977e517b166bd9e251bc20feebbed0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which are to PDFs, suggesting a link farm or redirection mechanism. The primary malicious URL identified is https://vilenefex.ru/strik, which is presented as a download for 'harvest moon ps1 bahasa indonesia iso', likely a lure to entice users to download a payload. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

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://vilenefex.ru/strik?utm_term=download+harvest+moon+ps1+bahasa+indonesia+iso PDF link annotation
- https://vugesajovor.weebly.com/uploads/1/3/4/2/134265649/walutudijapap.pdfIn PDF document text
- https://mijawogutudegi.weebly.com/uploads/1/3/4/3/134374589/6083113.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
- https://uploads.strikinglycdn.com/files/70ee6bfa-3476-4c7c-9b1e-5ada1eb1819d/62286711175.pdfIn PDF document text
- https://s3.amazonaws.com/pulavokaxe/gagemilugad.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/874d6056-6bbf-4cab-8797-92180b751449/fegolatumegazapadexut.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a953f795-d79c-4c17-847f-4860f9a7ce7a/samples_of_intercessory_prayers.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d74a0eed-7e67-40b9-938f-fe4550eaef97/omron_model_hem-711dlx_manual.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d16199a8-582e-4826-a21d-933851137bfa/sirinen.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a58bcc46-cc33-4e32-ad41-461ed1336acf/tablaturas_para_guitarra_electrica_de_rock.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aad0bb71-36a5-41cb-872b-2f0ed2439f13/dyson_animal_ball_loss_of_suction.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3d2df059-792a-455f-9797-789063e7adb5/sanumenarowomivuvovuw.pdfIn PDF document text
- https://s3.amazonaws.com/zeworibuzoza/leviwuzegebulurezomen.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/812ebd65-0bbf-4cb6-9d67-0e20d7349c68/tagejele.pdfIn PDF document text
- https://s3.amazonaws.com/ligole/cub_cadet_528_swe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ec767011-a95b-43ab-815f-915a573e342f/hochschild_the_managed_heart_reference.pdfIn PDF document text
- https://s3.amazonaws.com/tobaziw/black_hole_sun_westworld_sheet_music.pdfIn PDF document text
- https://s3.amazonaws.com/mijumomub/fulozivo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5133b49a-75e8-4d3d-a04b-149537ab8436/61471249140.pdfIn PDF document text
- https://s3.amazonaws.com/kefodek/pekapomavorudonajonal.pdfIn PDF document text
- https://s3.amazonaws.com/metakibeme/lepesele.pdfIn PDF document text
- https://s3.amazonaws.com/venunamazozuzo/how_do_i_get_my_plantronics_headset_to_ring_in_my_ear.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/667f78a8-a308-4486-9907-e4891778242e/line_6_spider_iv_15_jazz_settings.pdfIn PDF document text
- https://s3.amazonaws.com/nijosinizo/nozufatumibufar.pdfIn PDF document text
- https://s3.amazonaws.com/kosamupim/psx_emulator_for_ios.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b5c4dff4-70d1-4b90-bfe2-537b928d3720/bebafegusokusenugipa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ae16fc35-44ab-47b3-9425-fcd5fa1190e3/sixuvosurapi.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_off0000f69b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF69B	5332 bytes
SHA-256: `c620ea25e7f4b9c8b07485f108782a1f28e93b38c96aa6d2c2c6d7c210ac8380`
`font_01_sfnt_off000108a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108A0	11736 bytes
SHA-256: `740a659abc3e1e98e9668de98ee4285a60994d20645d3250f95ef9bd51134ac0`
`font_02_sfnt_off00013025.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13025	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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