PDF malware analysis — malicious · a41a6dd096e0d87f

MALICIOUS

PDF

45.8 KB Created: 2020-10-20 04:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: dd6b34ac17ecc1019e0620b59b2ecf7b SHA-1: 326e6561831562aa706ace9b6f1295db96c24af0 SHA-256: a41a6dd096e0d87f592b2c273cf0e4c3e4338a5536e0c0238e9bd43cb347c68b

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure for 'investing 101 pdf download', which is likely a pretext to encourage users to click the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://ggtraff.ru/123?keyword=investing+101+pdf+download In PDF document text
- https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/6286622.pdfIn PDF document text
- https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/pivamikutobater.pdfIn PDF document text
- https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/66733b4a155.pdfIn PDF document text
- https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/2e108967dbafb6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366313/normal_5f8af4bc7bbbb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366401/normal_5f8a06898f335.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370087/normal_5f8dc2653f7ca.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366358/normal_5f872a5461db2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384839/normal_5f8e3797c13a5.pdfIn PDF document text
- https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/3adeeac.pdfIn PDF document text
- https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/lapubepirutivak-tovavesuvusu.pdfIn PDF document text
- https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/1486141.pdfIn PDF document text
- https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/dozafawegikuxoto.pdfIn PDF document text
- https://xogefuvoza.weebly.com/uploads/1/3/2/3/132303221/pibufaferorutax.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/1/0431/4365/9677/files/18580497288.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0460/7587/1396/files/economic_system_worksheet_answers.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0502/5421/7388/files/essay_writing_format.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/0835/9067/files/rodan_and_fields_bright_eye_complex_dupe.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/8307/0629/files/word_to_converter_online_high_resolution.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0479/4148/4700/files/pisofos.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/3047/7472/files/miles_avenue_kelso.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0488/0623/2229/files/10196745859.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/3654/9018/files/golden_corporation_statement_of_cash_flows.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_off00006878.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6878	5396 bytes
SHA-256: `01bf854d32000ef1452cc3b36de907955c7be1d817d7fa0061c70ec6f36c00f5`
`font_01_sfnt_off00007afb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7AFB	1800 bytes
SHA-256: `a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620`
`font_02_sfnt_off00008388.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8388	10740 bytes
SHA-256: `125eaf07a819edbcead74bdbaee9d9dd29dca22925a63e71594bf3033c0a414c`

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