Malicious PDF — malware analysis report

Static analysis result for SHA-256 e987d3e084580d68…

MALICIOUS

PDF

114.7 KB Created: 2020-11-20 23:09:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 93b6a0994adf040fc42ec4591534c6ce SHA-1: 18c614cc53244f11807443457ff2dc3a96fc8880 SHA-256: e987d3e084580d6833e9a016ff2fcf2c2781e7f8ad55ef58365a59a5ccf85c94
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or content distribution strategy. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics confirm its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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 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.
  • 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://trafficel.ru/123?utm_term=csr2+tuning+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377905/normal_5f8f819237510.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_5fada86109332.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/merinorasaniv_nidikurawi_ketexirup.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://uploads.strikinglycdn.com/files/df17ed56-b764-4adf-9fd5-5bf16d43bb83/investigation_11_transpiration_pre_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/grundfos_recirc_pump_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b0314be-f2f1-49c8-b9ff-9c6f9211d4b6/58110316943.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/abridged_version_of_great_expectations.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/amiga_date_cuenta_libro_capitulo_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/411f449a-2e76-4e8b-b2b4-b87daec283f2/las_causas_de_la_segunda_guerra_mundial.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/instructional_fair_inc_answer_key_if8765.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/insidious_chapter_2_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/dad_s_belgian_waffles_algona.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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DE 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off000126a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A2 12892 bytes
SHA-256: 0eeb97d5fbc66a4636d9d87ceda29df1f3dbf89611121c7be27305a428092249
font_02_sfnt_off000150bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150BF 4676 bytes
SHA-256: 3cec6ff5727a4df98735c12634f42b88d08972a050609ff06025054d6c87b4a0
font_03_sfnt_off000160a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160A7 7424 bytes
SHA-256: 013ee83f37274ce93032a50987def73cfb446c22e651cdb5db5795eb1a4cabcb
font_04_sfnt_off00017184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17184 10772 bytes
SHA-256: dafdeed8741905466b5d91fd205287178bae05edc4e69c552dcb34c2f0c191f0
font_05_sfnt_off00019673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19673 16764 bytes
SHA-256: 77a46605620985975e371a4d1ba7e1a23f2d6878e71b067ebe09fc51426f3e3d
font_06_sfnt_off0001add8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADD8 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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