PDF malware analysis — malicious · e600de75055a4d38

MALICIOUS

PDF

81.4 KB Created: 2021-04-09 16:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 909b3afb00f5fb68fd532a40d906fb4d SHA-1: 03a09220a928635b861af4ee3ad648176fad5386 SHA-256: e600de75055a4d38e4ac5df762cf2866d5545df73be2c6f35b794debdd1a1411

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. The document body, though partially garbled, contains a search query suggesting a lure to a website. The PDF contains a large number of external links, many pointing to S3 buckets, which is characteristic of SEO link farm abuse for phishing. The primary malicious URL identified is jacksth.ru.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/strik?utm_term=what+can+i+eat+for+breakfast+on+keto+without+eggs PDF link annotation
- http://bimadepunepi.mypressonline.com/fisetelezusutem.pdfIn PDF document text
- http://tijudozi.scienceontheweb.net/zejoxunofubal.pdfIn PDF document text
- https://xesisawizes.weebly.com/uploads/1/3/1/6/131606125/8616940.pdfIn PDF document text
- https://moworanapubo.weebly.com/uploads/1/3/4/6/134685821/nebuvikupes.pdfIn PDF document text
- https://dawiganolakegoz.weebly.com/uploads/1/3/4/3/134367714/xosibufes.pdfIn PDF document text
- http://rasazajafatirek.mypressonline.com/duvupinununalujob.pdfIn PDF document text
- https://bukudemedu.weebly.com/uploads/1/3/1/4/131483547/5351132.pdfIn PDF document text
- https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/28701085a247d51.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/bagokiko/99141454496.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/31bd1979-1949-461c-adb0-c24ffba8a1a6/noxokiwubamofasewazoxole.pdfIn PDF document text
- https://s3.amazonaws.com/genedesowul/setugu.pdfIn PDF document text
- https://s3.amazonaws.com/lanorolowu/aberdeen_performing_arts_9_to_5.pdfIn PDF document text
- https://s3.amazonaws.com/pibabopuduj/baahubali_tamil_movie_hd_quality.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ecf85a4b-51f7-408f-89d8-d9709f9928b3/white_rodgers_thermostat_not_responding.pdfIn PDF document text
- https://s3.amazonaws.com/jidagafinuxesu/pejezuli.pdfIn PDF document text
- http://bujijawuta.atwebpages.com/45622311855.pdfIn PDF document text
- https://s3.amazonaws.com/varoximu/cal_poly_club_sports_forms.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a73a6422-075c-42d0-8697-47644384cc8e/58650006259.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c22c1e73-11fc-41de-8198-b063b0e10e67/power_pressure_cooker_xl_quick_start_guide.pdfIn PDF document text
- https://s3.amazonaws.com/furunumaroxun/manual_bocina_jbl_flip_2.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/042ea5e3-8cb2-4a8c-9c8c-bff3521a2f52/siruvivugofidupiwagusa.pdfIn PDF document text
- https://s3.amazonaws.com/fulosobezur/nejor.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eff0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFF0	5300 bytes
SHA-256: `a674e08578a4831d79b24e009f5485ddf4e6118872e0e0458198565da72e6d90`
`font_01_sfnt_off00010208.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10208	11064 bytes
SHA-256: `1c5614f79f5ad389ffcafcc1976c2afdeb7193025c0be2eebc61d894a99e6af4`
`font_02_sfnt_off000127e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x127E5	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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