PDF malware analysis — malicious · 3e5f0ba15f1bb00f

MALICIOUS

PDF

51.6 KB Created: 2020-10-29 03:00:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 7d108e7f2ae55a40f521132539e0ff74 SHA-1: 8238bee2f2bd8ade0d8cfff3ebebaba0f3be093e SHA-256: 3e5f0ba15f1bb00f7c5a4757f738e76219fc407bb39a782fa0dba91a5adfe28a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links and text that direct users to a malicious redirector URL, disguised as information about hair loss treatment. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links suggests a link farm or redirection scheme designed to obscure the ultimate destination. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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://cctraff.ru/aws?keyword=nizoral+hair+loss+how+to+use In PDF document text
- https://cdn-cms.f-static.net/uploads/4408881/normal_5f93e7a095bfc.pdfIn PDF document text
- https://zegimobigew.weebly.com/uploads/1/3/4/3/134313375/zijizezugibafasowe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367937/normal_5f8fb6726973b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376098/normal_5f8cfe80ddd38.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374002/normal_5f8da8d6cd7ab.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372673/normal_5f8c1f22784f4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420245/normal_5f99ece4ebfa5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410214/normal_5f961b643f272.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4407086/normal_5f99bc980b462.pdfIn PDF document text
- https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/fewosozoro-geguket.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/1/0498/2626/7291/files/pepexibawarim.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/5794/6530/files/lecture_1_atomic_theory_1_worksheet_answers.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/3784/1813/files/45672291755.pdfIn PDF document text
- https://s3.amazonaws.com/zijivevip/47552692106.pdfIn PDF document text
- https://s3.amazonaws.com/kewuxejikiwe/76112692122.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/0586/0248/files/antiderivative_calculator_symbolab.pdfIn PDF document text
- https://s3.amazonaws.com/gapivegek/mazoduwapekefokejisegujew.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/9779/0366/files/fgo_jp_latest_apk.pdfIn PDF document text
- https://s3.amazonaws.com/tosevud/logarithm_and_antilog_table.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0314/9479/files/pan_edit_application.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0480/9752/5912/files/86677764555.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/3074/0135/files/gozoluwa.pdfIn PDF document text
- https://s3.amazonaws.com/subud/dixozoxoranunufag.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/1344/7584/files/lizutidele.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/9087/9667/files/gt_racing_2_hack_apk_free_download.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007300.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7300	4884 bytes
SHA-256: `710eeb95189c87b5b7b83f446862f51da4ec199659eb4830d8aca7941a3a6e10`
`font_01_sfnt_off000083ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83AB	9852 bytes
SHA-256: `c59d38336dff27515007d4751ec394b248fa594894d3630b11a7d88c2b44a526`
`font_02_sfnt_off0000a586.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA586	17616 bytes
SHA-256: `c456bdea797c8f34efc4b7d66a80163def13149be14e08ea5ff7d1485ecb40cc`

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