PDF malware analysis — malicious · b5f609316d6ef98b

MALICIOUS

PDF

77.5 KB Created: 2021-03-19 20:17:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 0a02ea51e0e049638fbb69b072f0a38a SHA-1: cd34036767a2962abd8bf5f8f3a400859d726eb1 SHA-256: b5f609316d6ef98bbf6c2d5ec99a4373b8399a4dc288cfb32ae2bea07f36bf3a

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9992

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://yafferge.ru/123?utm_term=clarks+shoes+size+guide+australia In PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/mejifavo/dazuporefojudipu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fb7d8904-2e68-49c7-a80b-9030e0d5d8fe/37776689415.pdfIn PDF document text
- https://s3.amazonaws.com/polojuliragam/math_power_textbook_grade_7_answers.pdfIn PDF document text
- https://s3.amazonaws.com/wefadep/88687216682.pdfIn PDF document text
- https://s3.amazonaws.com/mejifavo/what_helps_relieve_gas_during_pregnancy.pdfIn PDF document text
- https://d692b82a-d563-45ba-818c-0512d98079dc.filesusr.com/ugd/1c7397_b308b54533044dc0a1ff70854db0ff93.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/dixaleko/wogoxegatedadapitawi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ba963993-0deb-46a8-b97f-adaa7e9ab388/how_to_remove_a_stuck_breech_plug.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/50d4eebb-1a68-4f31-912a-31b47fe59dae/tractor_john_deere_ground_loader_12v_peg_perego_-.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3d3070a8-4341-4766-8e4a-9e8c795ee70a/how_to_easy_learn_python.pdfIn PDF document text
- https://e012ec00-e8e8-475f-a96b-80cab2ad705b.filesusr.com/ugd/3f1139_a220bf8b1e4844e4ac1111e24f1838ec.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/lomiwexuva/46976990773.pdfIn PDF document text
- https://s3.amazonaws.com/sedimeraxufi/vovalujumovagowonubaj.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/93f3cc13-b987-4774-a848-e0ed177e8a4b/sixafitosusolo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2c35974f-2f60-43d2-ada4-200a1ca7d0e5/76461813076.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/19ec5e2d-e467-4d83-b311-fe591c09c0fe/bscs_biology_a_molecular_approach.pdfIn PDF document text
- http://dojidusajotat.epizy.com/fametiwimotamudeso.pdfIn PDF document text
- https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_3ed01d5938074aa28475232058056b21.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/nisiwanolom/dd_3.5_warblade_build.pdfIn PDF document text
- http://woxowezev.rf.gd/30501474851.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2aefaf70-5ac1-4989-bc8c-ea5ff5baa46c/60675875696.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/513da11b-4037-46da-844e-d209c3fca051/wordly_wise_3000_book_5_lesson_12.pdfIn PDF document text
- http://nukuzuxowilaz.epizy.com/64575129927.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_off0000ef8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF8C	5108 bytes
SHA-256: `ce634498cd8494f87c554eacba007f2142bfafb64fbea2922322db6d710e39ba`
`font_01_sfnt_off000100e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100E5	10900 bytes
SHA-256: `3a31b82a38d83d8f86fc3c1e19986833a340cc86ffc9f40055ce3a3e8a930611`

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