PDF malware analysis — malicious · 7f80ee2e635d57d2

MALICIOUS

PDF

82.1 KB Created: 2021-03-27 10:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02

MD5: 06d83dada81eb69ea56d751a976bb2cb SHA-1: a5760bdf9447810c2679d7b021404ca5b27e360f SHA-256: 7f80ee2e635d57d2cae0d51796c1213deb63e19e1ac4836af02629bd04e002ac

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, including those on disposable hosting, and a heuristic indicating a 'download button' lure suggests a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and external links are consistent with techniques used to deliver second-stage payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 6

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://baarspo.ru/award?keyword=balancing+chemical+equations+activity+pdf PDF link annotation
- https://cdn.sqhk.co/ninituraxasu/Xijjdgj/moxomunuzidewivemuki.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369334/normal_6056a587cef98.pdfIn PDF document text
- http://zumodaronomana.iblogger.org/inverse_of_quadratic_functions_worksheet.pdfIn PDF document text
- https://cdn.sqhk.co/minamojazi/YhhrkmB/tezajavilika.pdfIn PDF document text
- http://kiwepuwefa.22web.org/bill_of_exchange_silk_road.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388827/normal_60565ac897fe2.pdfIn PDF document text
- https://cdn.sqhk.co/fusifanux/Gcgfkhh/coach_mobile_homes_for_sale.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484632/normal_602f806f9436c.pdfIn PDF document text
- http://ruvinowuge.scienceontheweb.net/fidojolobi.pdfIn PDF document text
- http://matawobedopikam.mywebcommunity.org/kidebufo.pdfIn PDF document text
- https://cdn.sqhk.co/zubejavaxuvu/90ifhc9/neon_green_desktop_wallpaper.pdfIn PDF document text
- http://triple-doska5.club/xajoruw3iz2w.pdfIn PDF document text
- http://rawuzexo.iblogger.org/29480117000.pdfIn PDF document text
- https://cdn.sqhk.co/patizuruf/eMjahet/40156344818.pdfIn PDF document text
- http://stavki-na-sport.site/long_haired_mini_dapple_piebald_dachshundzy3nh.pdfIn PDF document text
- http://drive4mclaneaustell.com/43529480905vi32e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413231/normal_5fe9ee364d4ac.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/tamobalasu/acronis_backup_recovery_10_free.pdfIn PDF document text
- https://s3.amazonaws.com/zidosozawok/xitibafejabagovapo.pdfIn PDF document text
- http://ritumogadoj.onlinewebshop.net/types_of_poultry_breeds.pdfIn PDF document text
- http://viveguwoxifug.epizy.com/how_much_is_the_bar_course.pdfIn PDF document text
- https://s3.amazonaws.com/nuxulikiwab/pegifewo.pdfIn PDF document text
- http://wodowepakimeko.onlinewebshop.net/vefobowawipojexag.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_off0000f5fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5FA	5808 bytes
SHA-256: `37f7d591bb74f45a4536b9089de08e7e03439c9647ae903ddb436ee24aad722e`
`font_01_sfnt_off000109a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109A0	1552 bytes
SHA-256: `c0a0f98242d4433af83b08bf89adb04a203baee6a6c7b3d226478f51527c94a8`
`font_02_sfnt_off000111a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x111A5	11984 bytes
SHA-256: `37c7b5a54bdd132cda69aa8a760be987d3781556d1174203be40a533da994b3c`

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