PDF malware analysis — malicious · d007629f12d683ca

MALICIOUS

PDF

81.6 KB Created: 2021-03-06 02:36:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: ea6744a571d8c8a34c11e56b387136f7 SHA-1: 22b7978283f6f52f1fef3e7386faa4c2965442df SHA-256: d007629f12d683ca8e6115d77ebc39362ad82f0d79e07a1e7e77fb7b637a9e28

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with one prominent URL pointing to 'nipisod.ru', which is likely part of a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is structured as a link farm on disposable hosting, further supporting a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

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.
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://nipisod.ru/123?utm_term=2002+ford+explorer+sport+trac+4x4+towing+capacity PDF link annotation
- https://cdn.sqhk.co/vabedesi/g6ie9ih/piano_keyboard_online_price.pdfIn PDF document text
- http://vurujupafowutox.mypressonline.com/37894943775.pdfIn PDF document text
- https://cdn.sqhk.co/fugolamudara/jjag2gh/92228883629.pdfIn PDF document text
- http://wifunagidoli.mypressonline.com/keyboard_num_lock_not_working_windows_7.pdfIn PDF document text
- http://mixezitubut.mygamesonline.org/lg_front_load_steam_washer_and_dryer_reviews.pdfIn PDF document text
- http://vuzetasavuxoso.mygamesonline.org/34215097586.pdfIn PDF document text
- https://cdn.sqhk.co/jenireni/ODDibji/dbz_fighterz_super_warrior_arc.pdfIn PDF document text
- http://dawexefif.getenjoyment.net/lopi_answer_wood_stove_insert_blower.pdfIn PDF document text
- http://nutejujaxi.66ghz.com/32657760594.pdfIn PDF document text
- https://cdn.sqhk.co/sogunixe/jOjiijL/drum_kits_fl_studio.pdfIn PDF document text
- http://geloritiveda.mygamesonline.org/83863699085.pdfIn PDF document text
- http://xawamiwupajev.mygamesonline.org/wokaxalarovoponumabaza.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://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_34c11f2f1d9941368ae944ca0c103248.pdf?index=trueIn PDF document text
- https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_d78184bad138446e8b12fb8abd065129.pdf?index=trueIn PDF document text
- http://sinodigewenewe.rf.gd/assassin_s_creed_iv_black_flag_trainer.pdfIn PDF document text
- http://ximuxulizi.myartsonline.com/2001_honda_odyssey_transmission_rebuild_kit.pdfIn PDF document text
- http://totawuvibewe.rf.gd/brida_paulo_coelho_wiki.pdfIn PDF document text
- http://naxesabefadufu.atwebpages.com/intro_to_java_programming_comprehensive_version_global_edition_11_e.pdfIn PDF document text
- https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_1955623974024592bc233e93cce72642.pdf?index=trueIn PDF document text
- https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_ea70dbe5c45b49daae5a9948c96a4235.pdf?index=trueIn PDF document text
- https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_839ea6f20965442585774e2165ab3a94.pdf?index=trueIn PDF document text
- https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_ccfecdb89a834e02822c521a14e2b997.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_off0000f4f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4F2	5640 bytes
SHA-256: `bc9c39843fba04fa6e1e058b9102a811c733f5178564a6dc1cf25bcb87ed94c5`
`font_01_sfnt_off00010844.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10844	9908 bytes
SHA-256: `134b115eaee37154f0b3217d22ed40651f78682d801439f481eb00dd33752074`
`font_02_sfnt_off00012a3a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A3A	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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