PDF malware analysis — malicious · baadffd3a3c53b89

MALICIOUS

PDF

83.6 KB Created: 2021-03-13 21:12:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 2fb52fafe4dc69731d586c6fd5616ca1 SHA-1: 78a9db116032ff854225e9cac50a666d25422dcf SHA-256: baadffd3a3c53b89beaca8cba414fe8a60e0f53b19f7d2aacc09c85056a00ae3

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing lure designed to trick users into downloading a payload, likely disguised as a legitimate document.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 7

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 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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://jacksth.ru/123?utm_term=accelerator+plus+premium+apk+onhax PDF link annotation
- http://mxbur.fun/setivegawuye50.pdfIn PDF document text
- http://homiak.fun/balance_sheet_ngha_l_gw7y2m.pdfIn PDF document text
- http://meetsoda.club/the_lion_and_the_mouse_story_ka_morall13np.pdfIn PDF document text
- http://alexandreablog.com/grade_10_math_slope_worksheetsnbfcf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466143/normal_604c9859a9df5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4486997/normal_5fc952c7bc853.pdfIn PDF document text
- http://serviceforyou.site/6784146569656udf.pdfIn PDF document text
- http://uscarinsurance.info/gikalurivamumito42ae.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495385/normal_602e295219d95.pdfIn PDF document text
- http://normab-id.com/rimewarigagesufujerozod8qla.pdfIn PDF document text
- http://plafond.xyz/automatically_pictures_in_outlook_2010_gpo94dkv.pdfIn PDF document text
- http://mrshadow.net/75307426221zzu2m.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449001/normal_600dbc31ecec7.pdfIn PDF document text
- http://lg-copyrightforms.com/i_love_my_lover_book_quotesuemn0.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://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_d933d6ced55d4377ab1bc8bf47fe8f3b.pdf?index=trueIn PDF document text
- https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_1bc3b11a7a8a4740993fcfc842c610de.pdf?index=trueIn PDF document text
- https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_af521343297949b094a749bd2401b904.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xapidajovaji/what_does_the_counter_narrative_mean.pdfIn PDF document text
- https://s3.amazonaws.com/jiwisigetizoxif/13909041919.pdfIn PDF document text
- https://s3.amazonaws.com/vovabagubajegeb/17764859818.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_off0000efa3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFA3	5176 bytes
SHA-256: `2dfbc573f2ec5d9f9bc6868696eb04d18247ca9c1715e674de85fe8ac87cf43e`
`font_01_sfnt_off000100fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100FE	19464 bytes
SHA-256: `9a63d73f9de6ed79d5801cd9e01903cf1d835fc04d3990675c9530e3f3380774`
`font_02_sfnt_off00013177.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13177	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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