PDF malware analysis — malicious · 8d796131841bcd98

MALICIOUS

PDF

46.2 KB Created: 2020-10-26 19:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: e9a91fd7e03ca2267c130b7bb6e141a2 SHA-1: 9c73d751d5d6e386da3b0cff15c74a1d63588b49 SHA-256: 8d796131841bcd985f2aa9c3ec2d746a80066797b65ab7f3096bba1367081343

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Weebly. The primary link redirects to a malicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a 'thermochemistry chapter test answer key' and a URL, reinforcing the lure. No scripts were extracted, but the PDF structure itself facilitates the 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/123?keyword=17+thermochemistry+chapter+test+a+answer+key In PDF document text
- https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/b998bee.pdfIn PDF document text
- https://sewuvemap.weebly.com/uploads/1/3/4/3/134377394/xusad.pdfIn PDF document text
- https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
- https://xemojunaxumig.weebly.com/uploads/1/3/4/2/134265853/8084488.pdfIn PDF document text
- https://fujimerikav.weebly.com/uploads/1/3/4/3/134307110/9da05ce61a.pdfIn PDF document text
- https://liwobolavus.weebly.com/uploads/1/3/4/1/134131542/letarosolixokuv_wofibefukizusax_kegeseneges.pdfIn PDF document text
- https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/63dba5a1d.pdfIn PDF document text
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fubisi.pdfIn PDF document text
- http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://s3.amazonaws.com/suzixegazunow/tijazesirabajizor.pdfIn PDF document text
- https://s3.amazonaws.com/jolituzoji/class_11_chemistry_state_board_books_download.pdfIn PDF document text
- https://s3.amazonaws.com/mesotodimus/samsung_catalogue_2018.pdfIn PDF document text
- https://s3.amazonaws.com/mamibis/20436130198.pdfIn PDF document text
- https://s3.amazonaws.com/jadere/dazixatenojodamowu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e51c3b4d-15e0-40e1-bf3b-40f313366734/78950709527.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c70508bc-bf2d-496b-a868-d68d7a5704ef/nobifiguv.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a9c6e387-885f-483f-bed3-ceb00ad4bdf6/remimixitomej.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2f9f3c99-a57e-49ff-8135-b2bd3380a153/introduction_to_remote_sensing_fifth_edition.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/7888/4759/files/fikivepefefagi.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0463/5541/5206/files/takatosozagabezafe.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0502/1224/1583/files/avengers_logo_hd_wallpaper_for_android.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005e86.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E86	1604 bytes
SHA-256: `14496697e68b4a0f17b25b2d5c2a98c80d187e70e38cf32987288d75605d8b20`
`font_01_sfnt_off00006685.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6685	5224 bytes
SHA-256: `871c11ab6b4efa5b9a8005f46d777b1141727beb4f1539a03f71f2e2fc076388`
`font_02_sfnt_off0000783a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x783A	10600 bytes
SHA-256: `5692784d19d54c4e31f0fd9f8fa20c680612fd38bbe6328d363ca77cf02b1495`
`font_03_sfnt_off00009c80.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9C80	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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