PDF malware analysis — malicious · 53e52d79ea7088c0

MALICIOUS

PDF

45.1 KB Created: 2020-10-27 23:08:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: ba077d1cb363eca1c8132957ef727555 SHA-1: 943e69d8807a18f2fd1fdab9d9d048af35555e0a SHA-256: 53e52d79ea7088c0b1c450b0168d06d7bebf4adae216f5424e3053653132de53

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/ganutimibimar_gaxagafomexakul_salibewulosiv.pdf.
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://ttraff.cc/pify?keyword=vocabulary+and+study+guide+answers+for+the+great+gatsby In PDF document text
- https://cdn-cms.f-static.net/uploads/4373998/normal_5f8b5b5a76402.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367951/normal_5f8754e992ef2.pdfIn PDF document text
- https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/ganutimibimar_gaxagafomexakul_salibewulosiv.pdfIn PDF document text
- https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/tulagesobax.pdfIn PDF document text
- https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/2518399.pdfIn PDF document text
- https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/329e918b55847.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/9665/7058/files/kuvokerojibugijizawokado.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/4244/6741/files/hewlett_packard_6500_printer.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0468/0312/4375/files/obamacare_california_income_guidelines.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6043/6896/files/kufererimazi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/9938/1159/files/bachianas_brasileiras_no._5_guitar.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d75d4bbe-5f6c-4323-b848-d72e91549980/41018902103.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fa167404-7351-49d1-ab32-e09e4f93926d/21560335262.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f36a06ba-5921-438a-bf02-7cf18233a97d/ffxiv_trick_attack_trigger.pdfIn PDF document text
- https://s3.amazonaws.com/sugaguxagu/cubiertas_autoportantes.pdfIn PDF document text
- https://s3.amazonaws.com/jaxesabi/15187992123.pdfIn PDF document text
- https://s3.amazonaws.com/sazariwapa/adobe_reader_pro_apk.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files/autodesk_inventor_tutorial_for_beginners.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cd98b380-fbd4-4aab-bb75-1507f792fff7/34734110479.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ec5c87f8-a479-4c9a-abef-6aecfdb9cedd/.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/54dff346-4a65-4862-93f8-0f658a16b67d/65655240579.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006f03.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6F03	5584 bytes
SHA-256: `c02076d91793d15ea1659a64d9fe5d822f74987e850de41ce49828b785f8bdc8`
`font_01_sfnt_off00008205.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8205	10684 bytes
SHA-256: `20f53afeae07e7f918c5496e2b988a955058c664b32f1df16ce56bbc783e2a4c`

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