PDF malware analysis — malicious · 5d3d19a54a89e66f

MALICIOUS

PDF

80.0 KB Created: 2021-06-01 03:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20

MD5: 05635835ae1bbe0009b1199584e87bdf SHA-1: 730fefbd9f50b7b7487cad937772945586259220 SHA-256: 5d3d19a54a89e66fd4b0c40fbdbe13db853ad4a6142a6abbc607b2b413e72d48

216 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by multiple heuristics, including ML classification and ClamAV, specifically flagging it as a phishing lure impersonating Microsoft. The embedded link directs to a redirector hosted on weebly.com, which likely leads to a credential harvesting page. The PDF also contains numerous other external links, suggesting a link farm or SEO poisoning attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

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.
Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kibasixeb.weebly.com/uploads/1/3/1/4/131438563/larawifisebanixewolo.pdf.
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://crewmak.ru/pbw?utm_term=what+are+the+disadvantages+of+manual+system PDF link annotation
- https://kibasixeb.weebly.com/uploads/1/3/1/4/131438563/larawifisebanixewolo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4423772/normal_60535986849af.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4461505/normal_6006fbd1e8e36.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372361/normal_601587b616efd.pdfIn PDF document text
- https://kowedogade.weebly.com/uploads/1/3/4/8/134879104/3726616.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388424/normal_5fd79300124f9.pdfIn PDF document text
- https://gafibuludumogid.weebly.com/uploads/1/3/1/4/131453415/vajilupepave.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450338/normal_602140b9e0b82.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4486201/normal_60253b25d5bd0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426418/normal_600b9e9625dfd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456982/normal_601f946faffd1.pdfIn PDF document text
- https://vunemagerubu.weebly.com/uploads/1/3/4/5/134525741/9a3ff64ba90.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383170/normal_606cff9472cb9.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4452161/normal_6005736e229e1.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/c003284d-ef86-4e08-b6bb-7331186abf95/mainstays_essential_oil_fan_diffuser_instructions.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8c00de22-0346-4af3-80d6-07bac5399440/how_to_write_an_excuse_letter_due_to_sickness.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/db5a3667-376c-4751-940a-82a33599c7cf/gevinamarawusop.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/eacb30d5-bf92-4d28-9ceb-2496ae6ad3a8/can_i_use_my_phone_as_apple_tv_remote.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c025a1d7-703d-4d3b-8ac5-6f7c8db82333/dijav.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_off0000ec0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC0D	5380 bytes
SHA-256: `d28fe20a66dd92f2af596b30c1029b9704310348de5f7a8df964ef9192955089`
`font_01_sfnt_off0000fe40.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE40	10528 bytes
SHA-256: `adf6ee76d943e7579490f6db877ddfa726ce3e7c7e646b23655f0c1d488e67c9`
`font_02_sfnt_off0001224d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1224D	4324 bytes
SHA-256: `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`

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