PDF malware analysis — malicious · 3f117cce899fe12e

MALICIOUS

PDF

80.3 KB Created: 2021-03-14 07:24:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 01fb513ccdae926550329bb06e66ce54 SHA-1: 605373b01d202078083134c2efc77c725a150ca4 SHA-256: 3f117cce899fe12e7dd187414a9b40b5576412a7924a50346a4369be200fcaa8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, including one pointing to 'midufefew.ru', suggests a link farm or phishing attempt. While no scripts were directly extracted, the PDF structure and heuristic firings point towards a malicious document, potentially used for phishing or to distribute further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
External URI info PDF_URI

PDF contains an external URL action
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://midufefew.ru/award?keyword=biography+of+abraham+lincoln+pdf PDF link annotation
- https://cdn.sqhk.co/nilesatu/UbibdD7/paxexoguna.pdfIn PDF document text
- http://suzupuwejal.mygamesonline.org/why_did_the_renaissance_began_in_the_italian_city-states.pdfIn PDF document text
- http://didazema.mypressonline.com/25521485106.pdfIn PDF document text
- https://cdn.sqhk.co/tipefimex/jbjijei/nothing_to_declare_meaning.pdfIn PDF document text
- https://cdn.sqhk.co/kewawukufiju/8NKhgYh/36697101063.pdfIn PDF document text
- https://cdn.sqhk.co/kerutadit/jbihiam/adventure_landing_haunt_nights.pdfIn PDF document text
- http://tanivikovome.sportsontheweb.net/114_chakras.pdfIn 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/pezofut/php_html_formatter_online.pdfIn PDF document text
- https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_2166112b907d43cdbfc6a0d0fe5c0e05.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/dinisemowoge/38768726494.pdfIn PDF document text
- https://s3.amazonaws.com/pizivurapab/43683354676.pdfIn PDF document text
- https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_9c9734259653435682c287e713540513.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/viwoxuz/zififawu.pdfIn PDF document text
- http://vigavanoxe.onlinewebshop.net/sweetie_pies_cookbook.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2fb526d6-8209-4495-971c-8e51f5e1c518/alfreds_basic_piano_library_theory_book_level_3_answer_key.pdfIn PDF document text
- https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_1e09d837fb6d4df8bf00a4584bc297b0.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/pavujiniz/49162748751.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/984229a6-286e-4607-9e8d-365a2acc853a/ford_mustang_for_sale_craigslist_san_diego.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8bafb992-3c34-4021-aed8-e54fa4db42a5/la_la_land_lyrics_jay_z.pdfIn PDF document text
- http://bifovigavij.myartsonline.com/2019_ktm_85_sx_service_manual.pdfIn PDF document text
- https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_4fb334aa2a714020adb121622d252ae0.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/26b239e8-ecfd-426e-977d-e24852d6e8db/45571576047.pdfIn PDF document text
- https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_8f8012bc4b6747b28dceabbb3a841027.pdf?index=trueIn 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_off0000ef8d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF8D	5272 bytes
SHA-256: `ce84778a0a858b707c138d58628d6024da49f937ba03e0ce56cce79fff614678`
`font_01_sfnt_off00010144.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10144	10608 bytes
SHA-256: `dd9a679c69b35e1f96b7bef3b4817600a86b85a1b6ff5a4f51b106606e75dd4f`
`font_02_sfnt_off000125a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125A6	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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