PDF malware analysis — malicious · 83c4ec384499cbba

MALICIOUS

PDF

78.7 KB Created: 2021-04-01 06:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 0dba99e4b0cc29a5050c57268beec80a SHA-1: 8eca29c84241f4040295455076c0fb9d19a3a3dc SHA-256: 83c4ec384499cbba43c4e4fd7571fc45e7f27fcef6f4e26fb3f2113781399591

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains numerous embedded URLs, many pointing to disposable or suspicious domains, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with attempts to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://resalured.ru/award?keyword=nice+antenatal+care+guidelines+pdf PDF link annotation
- https://zexosupalagal.weebly.com/uploads/1/3/4/8/134887224/5618677.pdfIn PDF document text
- http://tevalevas.22web.org/bombay_to_goa_full_movie_720p.pdfIn PDF document text
- https://kawijidaxo.weebly.com/uploads/1/3/4/8/134891868/duvekapiwelam.pdfIn PDF document text
- http://zefefiwova.medianewsonline.com/mastering_elliott_wave.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381536/normal_604d11a2903e5.pdfIn PDF document text
- https://jijofovi.weebly.com/uploads/1/3/4/7/134755656/be7e717b4f257.pdfIn PDF document text
- https://vezefujofebiv.weebly.com/uploads/1/3/5/3/135304234/libipuros.pdfIn PDF document text
- http://javaxirivibewi.mygamesonline.org/30737233427.pdfIn PDF document text
- http://wamipivifubape.sportsontheweb.net/6541327733.pdfIn PDF document text
- https://furedanoduribi.weebly.com/uploads/1/3/4/6/134681858/guruso.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454550/normal_603d2d5861bd4.pdfIn PDF document text
- http://doruguduku.iblogger.org/american_heart_association_acute_myocardial_infarction_guidelines.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/rotowan/tesuxizoxe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/99ea363e-8fd5-4d05-8404-1f0076bd92fc/is_there_a_tintin_2.pdfIn PDF document text
- http://latafutotu.rf.gd/jofofuxawases.pdfIn PDF document text
- http://lesesopexapawu.rf.gd/87863286141.pdfIn PDF document text
- https://s3.amazonaws.com/xakajoziwibi/32766806972.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/943f33a3-a3fd-49ab-a0ca-3b02fed75562/sanyo_32_inch_tv_price.pdfIn PDF document text
- http://bolusober.epizy.com/81835406099.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b9144c17-cfa7-4bd7-a148-9a44be60fa10/peavey_vypyr_vip_1_metal_settings.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9025ea60-8dc4-473a-94f8-45ac9389171b/sparknotes_origin_of_species_chapter_6.pdfIn PDF document text
- https://s3.amazonaws.com/dugibabafod/wuxoraviwefad.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/21edaf2d-2d08-4910-960a-77b46da99aa7/how_to_change_light_bulb_in_dimplex_fireplace.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_off0000e2c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2C6	5292 bytes
SHA-256: `04d8f041b9a73bc13d53f2a5c389745a8d0b07d968b6b1b75a7e17e0d5580e7f`
`font_01_sfnt_off0000f4de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4DE	10088 bytes
SHA-256: `2f9aba360b25dd7c9bba2adf8bcce329cea8a00013baded37b2c8469a2e5ff61`
`font_02_sfnt_off0001179c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1179C	16060 bytes
SHA-256: `99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953`

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