PDF malware analysis — malicious · 336056f55f0597a2

MALICIOUS

PDF

91.9 KB Created: 2021-03-12 01:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 3523d365712b539e8d2d7749a9c80812 SHA-1: 549af5dcd0d5a0be9225c66f522079abfbd3c70d SHA-256: 336056f55f0597a2fb309b9304e4017f041b5d2d8f31a6cfaac0314ee32394ed

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 0.9990

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://resalured.ru/award?keyword=andhra+jyothi+telugu+news+paper+pdf PDF link annotation
- https://metuwudoguwo.weebly.com/uploads/1/3/5/3/135323448/xuvefito.pdfIn PDF document text
- https://fexejolimoti.weebly.com/uploads/1/3/4/1/134131812/gudivetowepi_darudelafusiwer.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/paxunu/tibco_jaspersoft_report_server.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/52d6f61b-4f2d-4733-b48a-f950d02f0790/vubowavurarawu.pdfIn PDF document text
- https://d848e4b6-662b-4424-a759-963270729452.filesusr.com/ugd/30e015_2767cf86ed2b4eba910833df065610b4.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/401156e2-76d1-4583-bebe-50099339c46a/xemukaxuv.pdfIn PDF document text
- https://s3.amazonaws.com/lomogas/what_is_key_informant_interview.pdfIn PDF document text
- https://s3.amazonaws.com/dukajevo/arangodb_performance_issues.pdfIn PDF document text
- https://s3.amazonaws.com/xojafemori/8_ball_pool_pc_version.pdfIn PDF document text
- https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_357a3f7205044d47b9bb2e7785ace6ed.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/76d08550-4278-466a-ab0a-dd2672b5b105/air_force_1_shadow_sneaker_pink.pdfIn PDF document text
- https://s3.amazonaws.com/woxotopapozokev/psychological_assessment_report_writing.pdfIn PDF document text
- https://s3.amazonaws.com/jejulurowev/tisebebukusi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/468b5d23-90fe-4360-a2b0-7928b3c67c3d/60256272876.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2ab702a5-34df-4b37-a02c-5b445e0fcceb/lojexaxaluluguwijopuvupar.pdfIn PDF document text
- https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_f834fc9808ff423f8683257a62fa71af.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/dbcd58a3-795a-4841-94c0-76b41e585b94/debagaj.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f392b1de-38ca-43bf-8181-c041b1e093c3/2_nephi_9_23.pdfIn PDF document text
- https://1b3e2d6a-0348-4772-9bb2-16e56a761455.filesusr.com/ugd/7bcf02_0dfb037f971b4da190bacbbffafac6d7.pdf?index=trueIn PDF document text
- https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_6d3ae94bb2bf4ce88d0c728eae5b3031.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/fizaxo/lyrics_7_years_lukas_graham_meaning.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/12b37eec-3e88-4fb3-872b-5a085ffdd434/kuxikivadefujased.pdfIn PDF document text
- https://s3.amazonaws.com/bezorito/58514111782.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_off0000f3e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3E0	5564 bytes
SHA-256: `41e1b04dc9923d4bb710159d460dddcf7e93431fa8a99ff3b7b231ed18310321`
`font_01_sfnt_off000106e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106E1	25088 bytes
SHA-256: `63322108ba5fae9879d1114f5ee28c24961d840daad0df12e8bec4cb2c4f4d8c`
`font_02_sfnt_off00013ec3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13EC3	10068 bytes
SHA-256: `bf259eb4e54ffa3bfcfc96c2b043325d2e8124ee098daafd6bab37640d740e4a`

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