Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2892427228b79fc…

MALICIOUS

PDF

86.5 KB Created: 2021-03-14 20:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c35e1ca6f63759b52fe2ea9b6d696035 SHA-1: 9977f315e409d3c03bae954f719258172757497a SHA-256: e2892427228b79fc714c80d0557541fe29589e4b9f416bc4054347d7124e3a84
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • 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.
  • 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://soxebez.ru/wix?keyword=o+haupt+voll+blut+und+wunden+imslp PDF link annotation
    • https://jujamepusa.weebly.com/uploads/1/3/2/8/132815903/vijupof.pdfIn PDF document text
    • http://mybiol.site/how_much_does_a_2019_yamaha_r6_costc4qem.pdfIn PDF document text
    • https://nalabusapigo.weebly.com/uploads/1/3/2/7/132740218/360bf.pdfIn PDF document text
    • http://kemirulopifixu.22web.org/hp_officejet_4500_wireless_all-in-one_printer_software_download.pdfIn PDF document text
    • https://befukifesili.weebly.com/uploads/1/3/1/4/131453358/450ac327b0de4.pdfIn PDF document text
    • https://mifafipuwekirej.weebly.com/uploads/1/3/5/3/135327035/sipalizadovid.pdfIn PDF document text
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/xanitebozopote.pdfIn PDF document text
    • http://technodom11.com/53831074013rhnej.pdfIn PDF document text
    • https://lawejuja.weebly.com/uploads/1/3/0/7/130740077/e20d51625bf4b.pdfIn PDF document text
    • https://tuwazumabokanif.weebly.com/uploads/1/3/4/6/134611666/e5e8ccae9c1.pdfIn PDF document text
    • http://gagewetero.iblogger.org/bengali_books_free_site.pdfIn PDF document text
    • https://resuzomesidi.weebly.com/uploads/1/3/4/7/134746605/dfd1199eb.pdfIn PDF document text
    • http://nnorm-id.com/europa_bold_font_ttf_freexry2p.pdfIn PDF document text
    • https://walagikolisof.weebly.com/uploads/1/3/4/4/134494282/ed0d4226.pdfIn PDF document text
    • https://gomimujexewawid.weebly.com/uploads/1/3/1/0/131070583/kaxugudipi_raboxenek.pdfIn PDF document text
    • https://gebejisidimi.weebly.com/uploads/1/3/5/3/135302949/munuzuko.pdfIn PDF document text
    • https://nolaxefipox.weebly.com/uploads/1/3/4/7/134740184/nutamiwefa.pdfIn PDF document text
    • https://jexabuwojese.weebly.com/uploads/1/3/1/3/131384148/zutuboduk.pdfIn PDF document text
    • http://likelid.xyz/338551395722agdr.pdfIn PDF document text
    • https://pixebekisutajud.weebly.com/uploads/1/3/0/7/130775176/61f0a3e2033ff2.pdfIn PDF document text
    • https://vamalogobiw.weebly.com/uploads/1/3/4/6/134696595/tubijotefotasawaf.pdfIn PDF document text
    • http://idealicacolumbia.site/how_much_is_ms_word_for_macim78p.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
    • http://puwiliguso.rf.gd/45542255741.pdfIn PDF document text
    • http://nixuverojezuluz.epizy.com/hand_operated_capsule_filling_machine.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CF 5304 bytes
SHA-256: 34d2342fa8396b079434ee16c40d48fe7cf61a25a8ef9bf50a2016cff9549055
font_01_sfnt_off0000f8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B2 2060 bytes
SHA-256: 6e9c2225690a294e4d6e366e768ddc3c6fb43e152ccb516d6bcc7b5d919d3d7e
font_02_sfnt_off0001025b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025B 11372 bytes
SHA-256: 2effe86d368ec8513d5aa99e5e07f1b3d93c2eb91a87964e95b65ddfe8821142
font_03_sfnt_off00012830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12830 16096 bytes
SHA-256: 2dff1fc3e5bf1049a512ca2ab3d4448021a5e4676c0c9a63fbc3d390c83797d9
font_04_sfnt_off00013cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF7 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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