Malicious PDF — malware analysis report

Static analysis result for SHA-256 526c08368633aa89…

MALICIOUS

PDF

98.2 KB Created: 2021-04-06 18:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48a48e5118b5a96b5a7a2feb0c15d7c7 SHA-1: cb9897deb087fbe15e76fe27fb2521bf533d6224 SHA-256: 526c08368633aa89cf098e1bcfc43094662afccb7b960519cec0bcfb89541a7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one pointing to a suspicious domain (jottigo.ru) that is likely part of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=determine+the+kinds+of+intermolecular+forces+that+are+present+in+kr
    • http://zajevafegex.iblogger.org/92936466968.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/08f09859-2fb9-4328-a82d-11d1973c6c85/xusovawikakowam.pdf
    • https://uploads.strikinglycdn.com/files/5ee5be91-677f-4725-b175-b2e074f46876/what_are_some_examples_of_hammurabis_code.pdf
    • https://uploads.strikinglycdn.com/files/dd2adf2d-2ae6-48f5-84ce-e1b8f4021470/what_are_the_negative_effects_of_modern_technology.pdf
    • https://uploads.strikinglycdn.com/files/8aa51be0-4d7e-4a62-a8ef-46cee4841441/how_to_use_hp_deskjet_2541.pdf
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_a65707c7d28d4708a3fac92479edf0a9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3dcd0683-4ce0-444d-9b3e-8068cac47c18/62394080594.pdf
    • http://voresabuso.rf.gd/google_chrome_on_mac_laptop.pdf
    • https://uploads.strikinglycdn.com/files/a948feb7-9772-43c2-9cf3-f9ae6543f694/vunukogojiwezejakiviv.pdf
    • https://d798de41-6847-46d1-b877-4f1b84f556ee.filesusr.com/ugd/3e315c_a0be8c02f2d64f6ba83020ac6c6e175c.pdf?index=true
    • https://s3.amazonaws.com/fuvidokibet/lg_g2_mini_lte_d620.pdf
    • https://uploads.strikinglycdn.com/files/d485a491-5333-4d95-ace7-1d90ad5954a0/zulogobunozuzu.pdf
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_3449aae0734a4d39af9aa6ee68fdddac.pdf?index=true
    • https://s3.amazonaws.com/wovugi/49852709987.pdf
    • http://xiwagopa.epizy.com/what_to_write_in_a_1st_birthday_time_capsule.pdf
    • https://uploads.strikinglycdn.com/files/dc9ce455-6109-48cd-bbf0-6591a0ed215c/warriors_don_t_cry_summary_chapter_1_5.pdf
    • http://xukiwelufa.epizy.com/harry_potter_magical_creatures_coloring_book.pdf
    • http://luvoxijamubisur.rf.gd/volume_of_different_shapes.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b8b.bin
7055bb90b6e051dea071b0cf7fb420a9859b27c8cc71ee3a8487bb6242538151		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8B 5456 bytes
font_01_sfnt_off00013df7.bin
1ad2bb7e3f7e1b7b44e7528d12292acc91d3098fba6469b1d3973c296915abf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF7 11660 bytes
font_02_sfnt_off0001661b.bin
249651805b0a8f5b4743f17da7e3943b18be49f9c75a96c0f18a2f62b87e55bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1661B 16084 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.