Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae45b319f685c9f…

MALICIOUS

PDF

98.4 KB Created: 2021-03-19 08:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14282f45ca765739108d00d580647ba1 SHA-1: 7b60058b93c846d35d0f16b88fd52e03a4d3efe6 SHA-256: 4ae45b319f685c9f5f35a44b65740057319c843d5dbf5994cf3eccb4572a21bc
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains a significant number of external links, with one pointing to 'baarspo.ru', suggesting a link farm or phishing attempt. While no scripts were directly extracted, the PDF structure and the presence of external URIs indicate an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://baarspo.ru/award?keyword=asian+tigers+pdf
    • http://cherrypimp.online/55408335149oydll.pdf
    • http://avit0.pro/viwanezoih1e.pdf
    • https://gemaxapofa.weebly.com/uploads/1/3/2/6/132681544/4276794.pdf
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/bonifuzifanixiz.pdf
    • http://natorg.fun/1715979407ba5mx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/62bdb588-16a0-4d63-a720-1b06fdf15403/nebonazi.pdf
    • https://uploads.strikinglycdn.com/files/06db35ae-cacc-48a9-b6d8-a5ce3464aa3a/jevow.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/letigosoxugodusax.pdf
    • https://uploads.strikinglycdn.com/files/55014b47-d5eb-4b59-86da-81695629eda4/kudabidoledonalusemos.pdf
    • https://s3.amazonaws.com/debamijizozexo/picture_comprehension_with_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/aa1ee914-7a65-4a64-96c5-8e3df7bd5866/use_ms_project_online_mac.pdf
    • https://s3.amazonaws.com/wopari/employee_contract_extension_letter_template.pdf
    • https://s3.amazonaws.com/rewepalazamiso/where_can_i_learn_master_riding.pdf
    • https://s3.amazonaws.com/lizuseguwix/what_is_the_current_ipad_mini_model.pdf
    • https://uploads.strikinglycdn.com/files/60afe270-c505-40bd-90ee-ad77631632ff/mubopafamavarisa.pdf
    • https://s3.amazonaws.com/gurupixabogivaz/toluvegopiwuxubofesinuvi.pdf
    • https://s3.amazonaws.com/piwupevivotixi/captain_america_civil_war_tamil_dubbed.pdf
    • https://s3.amazonaws.com/suxugipipolazog/vancomycin_davis.pdf
    • https://uploads.strikinglycdn.com/files/40a2b2a5-5542-4fdd-9bdc-1a46cacd2678/hodgdon_cfe_blk_subsonic_load_data.pdf
    • https://uploads.strikinglycdn.com/files/7ba439d3-8067-4244-a956-c3f8b657034a/buwub.pdf
    • https://uploads.strikinglycdn.com/files/e636fb8d-f082-4e1d-86e6-e553b5cbbd9c/32772616548.pdf
    • https://s3.amazonaws.com/zuvovoxigumuz/dedication_template_dissertation.pdf
    • https://s3.amazonaws.com/seriposuj/how_to_forward_calls_on_panasonic.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b6a.bin
10867a3deb5a0fd0c81cd626037a81b00d884a2b67936e20ba290756015eb079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6A 5520 bytes
font_01_sfnt_off00012ebf.bin
137dae1cc6ecbf2384f599f57c912799456f6e93f7d4a7c8e70d33349dee96bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBF 5164 bytes
font_02_sfnt_off00014060.bin
5b7cfd012d648ac33342a4a37f379afe6b92284107607b9f9b0020ebde885973		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14060 4380 bytes
font_03_sfnt_off00015040.bin
b2db94001ff067a9e9c2296ae136dc4f3464ef8964ac081ac1e2f8c706f3bd3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15040 13544 bytes

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