PDF malware analysis — malicious · ee8b538d0e66e623

MALICIOUS

PDF

86.5 KB Created: 2021-02-15 13:35:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: b6f6e4cf4db08bf4cbab5cea959264f8 SHA-1: 8581f3cbe87122447291c8437c38964f24a680b3 SHA-256: ee8b538d0e66e623f7de88a574467075a4aa2c3b008bd08d0f7258afab42eddd

232 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a phishing attempt. It impersonates Apple and uses a fake invoice lure to trick users into clicking a link that leads to a malicious PDF download. The presence of numerous external links suggests a link farm or SEO poisoning tactic.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 8

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.
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://mizavuzozubex.weebly.com/uploads/1/3/4/7/134730625/2da003a09a5.pdf.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://bologen.ru/strik?utm_term=pos+pax+s80+manuale+in+italiano PDF link annotation
- https://cdn-cms.f-static.net/uploads/4447663/normal_5fdae8ccb37e6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4477409/normal_600a6cafd5b0a.pdfIn PDF document text
- http://xosuvirakogaf.iblogger.org/82870033328.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4486053/normal_5fca3c20417ef.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369927/normal_602489739340a.pdfIn PDF document text
- https://mizavuzozubex.weebly.com/uploads/1/3/4/7/134730625/2da003a09a5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420020/normal_602938b080d04.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4383917/normal_5ff211d2d309a.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/guwutivupudutu/23910369879.pdfIn PDF document text
- https://s3.amazonaws.com/jiwotarotavuz/21803810473.pdfIn PDF document text
- https://s3.amazonaws.com/sifawekujiki/nintendo_64_emulator_free_for_android.pdfIn PDF document text
- https://s3.amazonaws.com/foneniz/handloom_bed_sheets_sri_lanka.pdfIn PDF document text
- https://s3.amazonaws.com/pewebopufupe/asrb_ldc_recruitment_2016.pdfIn PDF document text
- http://zosanugu.epizy.com/nomax.pdfIn PDF document text
- http://gowegonuma.epizy.com/sajita.pdfIn PDF document text
- https://s3.amazonaws.com/luxelula/72860591867.pdfIn PDF document text
- http://biwodonugawodil.rf.gd/angiosperms_vs_gymnosperms_worksheet.pdfIn PDF document text
- https://s3.amazonaws.com/xaliwalufoguni/altivar_212_programming_and_operation_guide_s1a53838.pdfIn PDF document text
- http://kefofasenufumug.epizy.com/visiting_card_eps_format_free.pdfIn PDF document text
- https://s3.amazonaws.com/gurupixabogivaz/internationalization_of_higher_education_in_india.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_off000106b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106B8	3008 bytes
SHA-256: `c810a551f9b21a031ec4e45963b2c6592bd7131a33e4689a96e8c36bfe0c3688`
`font_01_sfnt_off00011181.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11181	5276 bytes
SHA-256: `cfe85f1ec6011e129d82adbaa29adb965927ad92abdc64c494ca3a4d3426fdb4`
`font_02_sfnt_off00012365.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12365	12552 bytes
SHA-256: `2ece7f92ee630f3a2f9f9daa237ac29ab2ca7696b063cc4acdb6f7d7245a7c51`

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