PDF malware analysis — malicious · 51439c6c404a32a7

MALICIOUS

PDF

124.4 KB Created: 2021-05-20 15:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: 42be1df3ac206da80a19b1751e6cc347 SHA-1: 8175031f6f2321b4c0ee7f570caa82b8902911b6 SHA-256: 51439c6c404a32a722b6066fb151e3b11e7a62ff36c1aa42e4b4e6ead07cb5b6

164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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 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.
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://druttle.ru/strik?utm_term=download+game+ppsspp+naruto+shippuden+ultimate+ninja+storm+4+apk PDF link annotation
- https://dadizatutelebi.weebly.com/uploads/1/3/1/0/131070904/vepijo.pdfIn PDF document text
- https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/pakuzomadekari.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471083/normal_6062fc1dbe62a.pdfIn PDF document text
- https://zofenegug.weebly.com/uploads/1/3/1/6/131636866/bawuripidad_vexovel.pdfIn PDF document text
- https://xugugizebe.weebly.com/uploads/1/3/1/4/131482894/sosirawula.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4369313/normal_5ff1884ab91d5.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/tokit/zebufopojudijebiwifeb.pdfIn PDF document text
- https://s3.amazonaws.com/mudurixo/xujubulamurije.pdfIn PDF document text
- https://s3.amazonaws.com/fajixe/regukebasalenigodu.pdfIn PDF document text
- https://s3.amazonaws.com/bagokiko/rivasajuvapevazaxeze.pdfIn PDF document text
- https://s3.amazonaws.com/fadedosi/16134701244.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9d56b7b5-3b73-4b56-9c04-c16b14210f12/what_is_a_mos.pdfIn PDF document text
- https://s3.amazonaws.com/vovopafubipu/correct_score_betting_tips_app.pdfIn PDF document text
- https://s3.amazonaws.com/wupixufekijax/gatidutixupufajojudisup.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d3a47b19-35f5-4027-afae-6a068fac54d0/karcher_k7_pressure_washer_instructions.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/382f9769-5dde-4c04-8d72-9440e905d6c5/59201129173.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00015b8a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15B8A	6476 bytes
SHA-256: `5c96381b2956ba85bdc606e02b4bc67750563a6a571ffb0d67253edb336a5a64`
`font_01_sfnt_off00016b5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16B5F	5452 bytes
SHA-256: `e62864225596fb59b18d569d8cd4f5b58a94383d58b6068eb9119a538681c670`
`font_02_sfnt_off00017e7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17E7E	5576 bytes
SHA-256: `3226fd90cdf53e89347ab77857556744647d817d439115d053e78407096407ce`
`font_03_sfnt_off0001915e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1915E	14436 bytes
SHA-256: `f78ba80a98644349ad53e3f138af529b85b064cde2d5ffd1af78dd0a830542a2`
`font_04_sfnt_off0001bf77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1BF77	16140 bytes
SHA-256: `159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61`
`font_05_sfnt_off0001d473.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1D473	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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