PDF malware analysis — malicious · 9fe422202cf4c622

MALICIOUS

PDF

80.3 KB Created: 2021-03-27 12:28:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: 4e911a558a1d9d104a9345ee30480d48 SHA-1: 29b1983acac0440585f9acbcd4f770a39a97cbfe SHA-256: 9fe422202cf4c62249deca3487fec4d5b427e376242f9c842de9b848a59d6714

156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/strik?utm_term=identifying+parts+of+a+circle+worksheet+pdf PDF link annotation
- http://jotelefaxomawut.22web.org/how_to_setup_epson_perfection_v600_photo.pdfIn PDF document text
- http://kevumoler.22web.org/5689228671.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://uploads.strikinglycdn.com/files/82bd2e93-8c59-4258-bce7-68b476c80855/el_pollo_loco_chicken_restaurant_menu.pdfIn PDF document text
- https://s3.amazonaws.com/vapite/samsung_galaxy_s9_used_price_in_bangladesh.pdfIn PDF document text
- https://s3.amazonaws.com/woxewiwupir/what_are_logical_operators_in_java.pdfIn PDF document text
- https://s3.amazonaws.com/rerinago/wesexexonixutediluluxow.pdfIn PDF document text
- https://s3.amazonaws.com/tuzamada/canon_printer_driver_free_lbp6030.pdfIn PDF document text
- http://josisokapiziwi.rf.gd/nivavivisulilurigopejed.pdfIn PDF document text
- https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_f0c9620be7e24ee39d221e2608024684.pdf?index=trueIn PDF document text
- http://bidexegope.epizy.com/9320297395.pdfIn PDF document text
- https://s3.amazonaws.com/kosipefojaw/83476221367.pdfIn PDF document text
- http://punolubumima.epizy.com/35516459872.pdfIn PDF document text
- https://s3.amazonaws.com/nademopor/principio_antiformalista_procedimiento_administrativo.pdfIn PDF document text
- https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_b44adbd8d2384e77a06e481f58739c26.pdf?index=trueIn PDF document text
- https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_5244fc7d1d164cf0b442d5f7d5690d02.pdf?index=trueIn PDF document text
- https://770cee9b-59ea-4c2b-ae8d-aad83b0abb79.filesusr.com/ugd/8b25c7_c55c2ed952d248a5ab68eff7b4182265.pdf?index=trueIn PDF document text
- https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_f25374abc61645e98e5ece81c0a4596d.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/d5f7e20e-f6dc-41b5-a1f3-3efcb32fb97b/jbl_flip_5_review_soundguys.pdfIn PDF document text
- https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_6c98003731ee4b2c8ff4a4fd33708a36.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vavejijitatofu/52591960896.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e9afc53f-4a2d-482c-814a-635cbbfdfbcf/behavioral_neuroscience_8th_edition.pdfIn PDF document text
- https://s3.amazonaws.com/woneketelak/the_hack_driver_answers.pdfIn PDF document text
- https://s3.amazonaws.com/sikuva/vuboxugefuza.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7c0ae98c-7d6f-4ac8-af88-215c2d66e737/finance_business_partner_jobs_merseyside.pdfIn PDF document text
- https://53f03ce6-db0b-4f41-9bfc-6956ba41e1f4.filesusr.com/ugd/727e0f_33157dbe1e804a07b42eddc2dca0b6f9.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_off0000edf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDF3	5400 bytes
SHA-256: `d5d404655a02e26f9a4e2e7fe264be80c6f4f0a37a0907f5da926cb214e986fb`
`font_01_sfnt_off00010056.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10056	10732 bytes
SHA-256: `e74730e543fac5e14d25d0636da5c9599d9a1b2771bbfd2b6215901c30c1af89`
`font_02_sfnt_off000124f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124F2	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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